Peanut Butter Cup Dump Cake

Peanut Butter Cup Dump Cake is the kind of dessert that feels almost too easy for how rich and satisfying it tastes. It is fudgy, chocolatey, loaded with peanut butter flavor, packed with melty peanut butter cups, and made with the kind of low-effort method that saves the day when dessert needs to happen fast.

This is a one-bowl cake for chocolate and peanut butter lovers. A box of chocolate cake mix becomes the base, then creamy peanut butter, milk, oil, eggs, vanilla, chocolate chips, and chopped peanut butter cups turn it into something gooey, thick, and deeply comforting.

It has that warm, soft, almost brownie-like richness that makes people go back for another piece before the first slice is even finished. The peanut butter cups melt into little pockets throughout the cake, while the chocolate chips add extra sweetness and texture.

The best part is how little fuss it requires. There are no layers to stack, no frosting to smooth, no complicated techniques, and no long decorating session.

Everything comes together in one large mixing bowl. The batter is stirred, folded with chocolate chips and peanut butter cups, spread into a greased 9×13-inch baking dish, and baked until the edges are set and the center stays slightly fudgy.

This is the dessert for potlucks, birthdays, family nights, casual gatherings, and last-minute cravings. It tastes like a bigger, warmer, softer version of a chocolate peanut butter candy bar baked into cake form.

Serve it slightly warm with vanilla ice cream and it becomes even more irresistible. The ice cream melts into the chocolate cake, the peanut butter cups soften, and every spoonful feels like pure comfort.

Peanut Butter Cup Dump Cake is also flexible. You can use Devil’s Food cake mix for deeper chocolate flavor, swap in melted butter for a richer cake, add nuts, swirl in caramel, or even fold in edible cookie dough chunks.

It is the kind of cake that does not need to look perfect. If it cracks, sinks a little, or comes out extra gooey, it still tastes wonderful.

This recipe is simple, generous, and made for sharing. It is a dessert that asks for very little and gives back a pan full of chocolate-peanut butter joy.

Why You’ll Love This Peanut Butter Cup Dump Cake

This cake is incredibly easy. It is mixed in one bowl, poured into one pan, and baked without complicated steps.

It is full of chocolate and peanut butter flavor. Every bite tastes rich, sweet, and fudgy.

It uses simple ingredients. Cake mix, peanut butter, milk, oil, eggs, vanilla, chocolate chips, and peanut butter cups do all the work.

It is perfect for lazy baking. There is no frosting, layering, or decorating required.

It is a crowd-pleaser. Kids, adults, chocolate lovers, and peanut butter fans can all find something to love here.

It stores well. Leftovers can stay at room temperature for up to 3 days or freeze for up to 2 months.

Recipe Details

This recipe bakes at 350°F (175°C). Use a 9×13-inch baking dish for the best thickness and even baking.

The pan should be lightly greased with butter or nonstick spray. This helps the cake release more easily after baking.

The base is 1 box chocolate cake mix. Any brand works, and Devil’s Food cake mix gives extra richness.

The peanut butter is 1 cup creamy peanut butter. Regular creamy peanut butter blends better than natural peanut butter for this cake.

The liquid is 1 cup milk. Whole milk gives the cake extra tenderness, but any kind you have can work.

The mix-ins are 1 cup chocolate chips and 1 cup chopped peanut butter cups. Semi-sweet chocolate chips are a great choice, but milk chocolate or dark chocolate also works.

The fat is ½ cup vegetable oil. Melted butter can be used if you want a richer flavor.

The eggs are 3 large eggs. Use large eggs, and bring them to room temperature if possible.

The vanilla is 1 teaspoon vanilla extract. It adds depth and rounds out the chocolate and peanut butter flavor.

Bake for 30 minutes, checking around the 25-minute mark. A toothpick inserted into the center should come out with a few moist crumbs, not wet batter.

Ingredients

For the Dump Cake

• 1 box chocolate cake mix
• 1 cup creamy peanut butter
• 1 cup milk
• 1 cup chocolate chips
• 1 cup peanut butter cups, chopped
• ½ cup vegetable oil
• 3 large eggs
• 1 teaspoon vanilla extract

Optional Swaps, Add-Ins, and Serving Ideas

• Devil’s Food cake mix
• Melted butter
• Semi-sweet chocolate chips
• Milk chocolate chips
• Dark chocolate chips
• Mini peanut butter cups
• Regular-size peanut butter cups, chopped
• Almond butter
• Gluten-free cake mix
• Chopped nuts
• Caramel bits
• Reese’s Pieces
• ½ cup chopped peanuts
• ½ cup chopped pecans
• ¼ cup caramel sauce
• Funfetti cake mix
• Edible cookie dough chunks
• Extra peanut butter
• Vanilla ice cream
• Chocolate sauce
• Extra peanut butter drizzle
• Almond milk
• Unsweetened applesauce
• Flax egg

Ingredient Notes

Chocolate cake mix creates the quick, easy base of this dessert. Devil’s Food cake mix is especially good if you want a deeper chocolate flavor.

Creamy peanut butter gives the cake its signature peanut butter richness. Regular creamy peanut butter is best because it blends smoothly into the batter.

Natural peanut butter is not ideal here. Its texture can separate and may not blend as evenly.

Milk helps create the thick, glossy batter. Whole milk makes the cake extra tender, but any milk can work.

Chocolate chips add extra pockets of chocolate throughout the cake. Semi-sweet is a classic choice, while milk chocolate makes the cake sweeter and dark chocolate makes it richer.

Chopped peanut butter cups are the star mix-in. Mini peanut butter cups are easy to use, but regular ones can be chopped.

Vegetable oil keeps the cake moist. Melted butter can replace it for a richer flavor.

Large eggs help hold the cake together. Room-temperature eggs mix more smoothly into the batter.

Vanilla extract adds background flavor. It makes the chocolate and peanut butter taste deeper.

If using peanut butter cups that tend to sink, toss them with a spoonful of cake mix before folding them in. This can help suspend them better in the batter.

Optional Swaps, Variations, Add-Ins, and Serving Ideas

Classic Peanut Butter Cup Dump Cake

Make the cake with chocolate cake mix, creamy peanut butter, milk, vegetable oil, eggs, vanilla, chocolate chips, and chopped peanut butter cups. This gives the full gooey chocolate-peanut butter version.

Serve slightly warm for the best texture. Add vanilla ice cream if desired.

Devil’s Food Peanut Butter Cup Dump Cake

Use Devil’s Food cake mix for a deeper chocolate flavor. This makes the cake taste extra rich.

The peanut butter and candy pieces stand out beautifully against the dark chocolate base. Bake the same way.

Melted Butter Version

Use melted butter instead of vegetable oil. This gives the cake a richer flavor.

The texture may be slightly different, but it will still be delicious. Let the butter cool slightly before mixing.

Semi-Sweet Chocolate Chip Version

Use semi-sweet chocolate chips for a balanced chocolate flavor. They keep the cake from becoming overly sweet.

This is a great everyday choice. It works well with the peanut butter cups.

Milk Chocolate Version

Use milk chocolate chips if you want a sweeter cake. This version tastes closer to a candy bar.

It is especially kid-friendly. Serve with milk or ice cream.

Dark Chocolate Version

Use dark chocolate chips for a richer, less sweet flavor. This helps balance the peanut butter cups.

Dark chocolate is a good choice if you want a more intense dessert. The cake stays fudgy and bold.

Mini Peanut Butter Cup Dump Cake

Use mini peanut butter cups straight from the bag. This saves chopping time.

They distribute easily through the batter. Keep some extra for sprinkling on top if desired.

Reese’s Pieces Dump Cake

Swap peanut butter cups for Reese’s Pieces. Save a handful for sprinkling on top if you like extra color and crunch.

The texture will be different but fun. This version works well for parties.

Almond Butter Chocolate Dump Cake

Use almond butter instead of peanut butter. The flavor will change slightly.

This is a helpful swap when you want a different nut butter profile. Use a smooth almond butter for easier mixing.

Gluten-Free Peanut Butter Cup Dump Cake

Use your favorite gluten-free cake mix. The rest of the method stays the same.

Texture may vary depending on the mix. Bake until the center has moist crumbs, not wet batter.

Dairy-Free Direction

Use almond milk in place of regular milk if needed. Choose mix-ins that fit your needs.

The cake can still be rich and chocolatey. Check labels for the cake mix and candy pieces if needed.

Nutty Peanut Butter Dump Cake

Stir in ½ cup chopped peanuts or pecans. This adds crunch to the fudgy cake.

Peanuts lean into the peanut butter flavor, while pecans add a buttery crunch. Fold them in gently.

Caramel Peanut Butter Dump Cake

Swap peanut butter cups for caramel bits or swirl in ¼ cup caramel sauce before baking. This adds gooey caramel sweetness.

You can also drizzle extra caramel over the finished cake. Serve warm.

Cookie Dough Dump Cake

Fold in chunks of edible cookie dough along with the chocolate chips. This creates a fun, over-the-top dessert.

Keep the chunks small enough to distribute evenly. The cake will be extra rich.

Peanut Butter Ribbon Dump Cake

Drop spoonfuls of extra peanut butter on top before baking. Swirl with a knife.

This creates ribbons of peanut butter across the top. Do not over-swirl, or the effect will disappear.

Ice Cream Sundae Serving

Serve warm cake with vanilla ice cream. The cold ice cream melts into the chocolate and peanut butter.

Add chocolate sauce or extra peanut butter drizzle if desired. This turns the cake into a full dessert plate.

Why This Recipe Works

This recipe works because the cake mix creates a dependable chocolate base. It saves time and keeps the method simple.

Creamy peanut butter blends into the batter and adds rich peanut flavor. It also makes the cake feel fudgier.

Milk, oil, and eggs give the cake moisture and structure. Together, they help the cake bake soft instead of dry.

Chocolate chips add extra chocolate pockets. Peanut butter cups add melty candy pieces throughout the cake.

The 9×13-inch dish gives the batter room to bake evenly. It creates a cake that is thick but not too tall.

The toothpick test is important. You want moist crumbs, not wet batter, so the cake stays fudgy without being raw.

Cooling for at least 20 minutes helps the cake set. This makes slicing easier.

The recipe is forgiving because the flavor is bold. Even if the top cracks a little, the chocolate and peanut butter still deliver.

Directions

Step 1: Preheat the Oven

Preheat the oven to 350°F (175°C). Let it fully heat before the cake goes in.

A fully heated oven helps the cake bake evenly. This is especially important for a thick, fudgy dessert.

Step 2: Prepare the Baking Dish

Lightly grease a 9×13-inch baking dish with butter or nonstick spray. Coat the bottom and sides.

This helps prevent sticking. It also makes serving cleaner after the cake cools.

Step 3: Set Out the Eggs

Use 3 large eggs. If they are cold, place them in warm water for about 5 minutes.

Room-temperature eggs mix more smoothly into the batter. Cold eggs can make the batter lumpy.

Step 4: Choose a Large Mixing Bowl

Grab a large mixing bowl. This recipe is meant to be simple, so one bowl is enough.

A big bowl gives you room to stir without spilling. The batter will become thick.

Step 5: Add the Main Batter Ingredients

Add the chocolate cake mix, 1 cup creamy peanut butter, 1 cup milk, ½ cup vegetable oil, 3 large eggs, and 1 teaspoon vanilla extract to the bowl.

Use a sturdy spatula, wooden spoon, or mixer on low if needed. Start gently so the cake mix does not fly out.

Step 6: Mix the Batter

Stir until the batter becomes thick, glossy, and mostly smooth. At first, it may look lumpy and uneven.

Keep mixing just until everything comes together. A few tiny peanut butter lumps are fine because they melt into the cake.

Step 7: Avoid Overmixing

Stop mixing once the batter is combined. Overmixing can make the cake dense.

The goal is a thick, pourable batter that looks like an indulgent brownie batter. It should not be thin.

Step 8: Prepare the Mix-Ins

Measure 1 cup chocolate chips and 1 cup chopped peanut butter cups. If using regular-size peanut butter cups, chop them into pieces.

Mini peanut butter cups can be used straight from the bag. They are a helpful shortcut.

Step 9: Prevent Sinking if Desired

If you are worried the peanut butter cups will sink, toss them with a spoonful of cake mix before folding them in. This helps them stay suspended.

Use only a light coating. You do not need much.

Step 10: Fold in the Chocolate Chips and Peanut Butter Cups

Gently fold the chocolate chips and chopped peanut butter cups into the batter. Use just a few turns.

Do not overmix. You only need the pieces distributed throughout the batter.

Step 11: Spread the Batter

Pour the batter into the greased 9×13-inch baking dish. Use a spatula to spread it evenly.

Push the batter into the corners. An even layer helps the cake bake evenly.

Step 12: Add Optional Toppings or Swirls

If using extra peanut butter, drop spoonfuls on top and swirl lightly with a knife. If using caramel sauce, swirl in ¼ cup before baking.

Keep the swirl gentle. Too much mixing will blend it into the batter instead of leaving ribbons.

Step 13: Bake the Cake

Bake for 30 minutes. Start checking around the 25-minute mark.

The edges should look set. The center should not have wet batter.

Step 14: Test for Doneness

Insert a toothpick into the center. It should come out with a few moist crumbs.

If the toothpick has wet batter, bake for another 5 minutes. Do not overbake, or the cake can lose its fudgy texture.

Step 15: Cool Before Slicing

Remove the cake from the oven and let it cool for at least 20 minutes. This gives the cake time to set.

The wait helps slices come out cleaner. If you scoop it early, it will be softer and more gooey.

Step 16: Serve Warm

Serve the cake slightly warm. This keeps the chocolate chips and peanut butter cups soft and melty.

Add vanilla ice cream if desired. A drizzle of extra peanut butter or chocolate sauce also works well.

Step 17: Store Leftovers

Store leftovers in an airtight container at room temperature for up to 3 days. Cover tightly so the cake stays moist.

For longer storage, wrap slices in plastic and freeze for up to 2 months. Reheat as needed.

Step 18: Reheat Individual Slices

Microwave a slice for about 15 seconds. This brings back the warm, gooey texture.

Do not microwave too long. The cake only needs a quick warm-up.

Serving Ideas

Serve Peanut Butter Cup Dump Cake warm from the pan after it has cooled for at least 20 minutes. The cake will be fudgy, soft, and easier to slice.

Add a scoop of vanilla ice cream on top. The cold ice cream melts into the warm chocolate-peanut butter cake.

Drizzle extra peanut butter over each serving if you want more peanut butter flavor. Warm the peanut butter slightly so it pours easily.

Chocolate sauce is another good topping. It makes the dessert even richer.

Serve it at potlucks or birthdays. It is easy to transport in the baking dish.

Cut it into squares for casual gatherings. The pieces do not need to be perfect.

Serve with a spoon if you want a gooier dessert. This cake is just as good scooped as sliced.

Hide a few slices in the freezer for late-night cravings. They reheat quickly.

Storage

Store leftover Peanut Butter Cup Dump Cake in an airtight container. It can stay at room temperature for up to 3 days.

Keep it covered tightly so it does not dry out. The cake stays soft when sealed well.

If your kitchen is warm, check the texture before serving. A quick microwave warm-up can bring back the gooey feel.

Microwave a slice for about 15 seconds to reheat. This makes the chocolate chips and peanut butter cups softer.

Do not overheat slices. Too much microwave time can make the cake tough.

If topping with ice cream, add it after reheating. Do not store cake with ice cream on it.

For the best flavor, enjoy the cake within the first few days. It is richest when fresh or gently warmed.

Freezing

Freeze slices wrapped in plastic for up to 2 months. Wrap them well to protect the texture.

Place wrapped slices in a freezer-safe bag or container. This makes it easy to grab one piece at a time.

Thaw a slice before reheating if desired. You can also warm gently from chilled or partially thawed.

Microwave for about 15 seconds once thawed. Add a little extra time only if needed.

Freezing individual portions is a great emergency-dessert trick. It keeps the cake ready for cravings.

Do not freeze with ice cream or sauce already added. Add toppings fresh after reheating.

Label the package if desired. This helps track the 2-month storage time.

Make-Ahead

This cake can be baked ahead and stored at room temperature for up to 3 days. Keep it in an airtight container.

For a party, bake it earlier in the day and reheat slices briefly before serving. Warm cake tastes especially good with ice cream.

You can also freeze slices for up to 2 months. This is helpful for planning ahead.

If making the cake for guests, wait to add extra drizzles until serving. Fresh peanut butter or chocolate sauce looks better.

Room-temperature eggs mix best, so set them out ahead if possible. If you forget, soak them in warm water for 5 minutes.

Chop peanut butter cups ahead of time if using regular-size cups. Mini cups save that step.

Keep the method simple. Mix, bake, cool, and serve.

Helpful Notes for Best Results

Do not overmix the batter. Stir only until it comes together.

Use regular creamy peanut butter for the smoothest texture. Avoid natural peanut butter for this recipe.

Start checking the cake at 25 minutes. Ovens vary.

The center should be slightly fudgy when done. A toothpick should come out with moist crumbs.

Do not overbake. Overbaking can dry out the cake and take away the gooey texture.

Use room-temperature eggs if possible. Cold eggs can make the batter lumpy.

If you forgot to set out the eggs, soak them in warm water for 5 minutes. This is a quick fix.

Mini peanut butter cups save time. They can go straight into the batter without chopping.

Variations

Classic Peanut Butter Cup Dump Cake

Use chocolate cake mix, creamy peanut butter, milk, chocolate chips, peanut butter cups, vegetable oil, eggs, and vanilla. This gives the full gooey chocolate-peanut butter version.

Bake until the edges are set and the center has moist crumbs. Serve warm.

Devil’s Food Dump Cake

Use Devil’s Food cake mix for deeper chocolate flavor. This makes the cake extra rich.

Keep the peanut butter and mix-ins the same. The result is bold and fudgy.

Butter-Rich Dump Cake

Use melted butter instead of vegetable oil. This gives a richer flavor.

The cake will still be soft and indulgent. Let the butter cool slightly before adding.

Crunchy Peanut Butter Version

Use crunchy peanut butter instead of creamy. This adds texture.

The batter may be slightly thicker. Add a splash more milk if it feels too stiff.

Almond Butter Dump Cake

Use almond butter instead of peanut butter. The flavor changes slightly.

Use a smooth almond butter for best mixing. The cake remains rich and chocolatey.

Gluten-Free Dump Cake

Use a gluten-free cake mix. Follow the same method.

The texture may vary depending on the brand. Bake until the center has moist crumbs.

Dairy-Free Direction

Use almond milk instead of regular milk. Check the cake mix and candy labels as needed.

The cake will still be chocolatey and satisfying. The texture may change slightly.

Egg-Free Direction

Replace each egg with ¼ cup unsweetened applesauce or a flax egg. The cake will be denser.

This swap still works for a rich dessert. Do not expect the exact same texture.

Nutty Delight Dump Cake

Add ½ cup chopped peanuts or pecans. This gives crunch.

Fold them in with the chocolate chips and peanut butter cups. Keep the batter gently mixed.

Caramel Chaos Dump Cake

Swap peanut butter cups for caramel bits or swirl in ¼ cup caramel sauce before baking. This adds gooey caramel sweetness.

Serve warm for the best caramel texture. A little ice cream works beautifully here.

Funfetti Chocolate Peanut Butter Cake

Use funfetti cake mix for a birthday-style twist. The flavor will be different, but fun.

This is a playful variation. Keep the peanut butter cups or use Reese’s Pieces.

Cookie Dough Dump Cake

Fold in chunks of edible cookie dough along with the chocolate chips. This makes the cake extra indulgent.

Use small chunks so the batter bakes evenly. Serve warm.

Peanut Butter Ribbon Cake

Drop spoonfuls of extra peanut butter on top before baking. Swirl gently with a knife.

The swirl creates peanut butter ribbons across the top. Do not overmix the swirl.

Reese’s Pieces Dump Cake

Swap the peanut butter cups for Reese’s Pieces. Save a handful for sprinkling on top if desired.

This gives the cake a little candy crunch. It is great for parties.

Ice Cream Sundae Dump Cake

Serve warm squares with vanilla ice cream, chocolate sauce, and peanut butter drizzle. This turns the cake into a sundae-style dessert.

Use small slices because the cake is rich. Serve immediately.

Troubleshooting

The Cake Is Too Dry

It may have baked too long. Start checking at 25 minutes next time.

The toothpick should have moist crumbs, not come out completely dry. Fudgy texture is part of the dessert.

The Cake Is Too Gooey

It may need more baking time. Add another 5 minutes if the center still has wet batter.

Check again with a toothpick. The center should not be raw.

The Batter Looks Lumpy

A few small peanut butter lumps are fine. They melt into the cake.

If the eggs were cold, the batter may look less smooth. Room-temperature eggs help.

The Batter Is Too Thick

If using crunchy peanut butter or a thicker peanut butter, add a splash more milk. Stir gently.

The batter should be thick but pourable. It should spread in the pan.

The Peanut Butter Cups Sunk

Toss the chopped peanut butter cups with a spoonful of cake mix before folding them in. This can help keep them suspended.

Also avoid overmixing after adding them. Fold gently.

The Cake Stuck to the Pan

Grease the baking dish well with butter or nonstick spray. Coat the corners too.

Let the cake cool before slicing. Warm cake is softer and can stick more easily.

The Cake Tastes Too Sweet

Use semi-sweet or dark chocolate chips next time. They balance the peanut butter cups.

Serve with plain vanilla ice cream rather than extra sauce. This helps soften the sweetness.

The Cake Is Dense

The batter may have been overmixed. Stir only until combined.

Egg swaps can also create a denser texture. This is normal with applesauce or flax eggs.

The Top Cracked

That is fine. A cracked top is normal for a fudgy cake.

Serve with ice cream or drizzle if you want a softer look. The flavor will still be delicious.

The Cake Needs More Peanut Butter Flavor

Add a peanut butter ribbon on top before baking. Drop spoonfuls of peanut butter and swirl gently.

You can also drizzle extra peanut butter over warm slices. This gives stronger flavor without changing the bake.

Frequently Asked Questions

Can I use crunchy peanut butter instead of creamy?

Yes, crunchy peanut butter works. It adds texture to the cake.

The batter may be slightly thicker. If it feels too stiff, add a splash more milk.

How long does this cake last?

It is best within 3 days at room temperature when covered tightly. Store it in an airtight container.

For longer storage, freeze slices for up to 2 months. Reheat when ready to eat.

Can I make this without eggs?

Yes, swap each egg for ¼ cup unsweetened applesauce or a flax egg. The texture will be denser.

The cake will still taste rich and chocolatey. Bake until the center is set with moist crumbs.

Why did my peanut butter cups sink to the bottom?

They may have been too heavy for the batter. Toss them with a spoonful of cake mix before folding in.

This helps them stay suspended. Fold gently and avoid overmixing.

Can I use almond butter instead of peanut butter?

Yes, almond butter can be used. The flavor will change slightly.

Use a smooth almond butter for best texture. The cake will still pair well with chocolate.

Can I use gluten-free cake mix?

Yes, use your favorite gluten-free cake mix if needed. The method stays the same.

The texture may vary by brand. Check doneness with the toothpick test.

Can I use milk chocolate or dark chocolate chips?

Yes, both work. Milk chocolate makes the cake sweeter, while dark chocolate makes it richer.

Semi-sweet is a good balanced option. Choose based on your taste.

Can I serve this cold?

You can, but it is best slightly warm. Warming makes the peanut butter cups and chocolate chips gooey again.

Microwave a slice for about 15 seconds. Add ice cream if desired.

Why This Recipe Works So Well

Peanut Butter Cup Dump Cake works because it combines a reliable cake mix base with rich peanut butter and candy-style mix-ins. The result is simple but deeply satisfying.

The chocolate cake mix creates the structure. It makes the recipe easy and dependable.

Creamy peanut butter adds richness and flavor throughout the batter. It also makes the cake feel fudgy.

Milk, oil, eggs, and vanilla bring moisture, structure, and depth. Together, they turn the dry mix into a thick, glossy batter.

Chocolate chips create extra chocolate pockets. Peanut butter cups melt into sweet, creamy pieces throughout the cake.

The 9×13-inch dish helps the cake bake evenly. It gives the batter space to set without becoming too tall.

Starting the doneness check at 25 minutes protects the texture. The cake should stay fudgy, not dry.

Cooling for at least 20 minutes helps the cake firm enough to slice. It also lets the melted candy settle slightly.

Most of all, this cake works because it delivers big dessert flavor with very little effort. It is rich, warm, chocolatey, peanut buttery, and exactly the kind of easy dessert people remember.

Final Thoughts

Peanut Butter Cup Dump Cake is made with chocolate cake mix, creamy peanut butter, milk, chocolate chips, chopped peanut butter cups, oil, eggs, and vanilla, then baked into a thick, fudgy dessert that tastes like a warm chocolate-peanut butter candy bar. The batter comes together in one bowl, bakes in a 9×13-inch pan, and turns into a rich cake with melty mix-ins in every slice.

Serve it warm with vanilla ice cream, extra peanut butter drizzle, chocolate sauce, or a spoon straight from the corner if the craving wins. With its 3-day room-temperature storage, 2-month freezer option, quick 15-second microwave reheat, and variations like caramel, nuts, cookie dough, Reese’s Pieces, Devil’s Food cake mix, gluten-free mix, almond milk, and egg swaps, this dump cake is an easy dessert worth keeping for busy nights, potlucks, birthdays, and every chocolate-peanut butter emergency in between.

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Peanut Butter Cup Dump Cake

Rich, chocolatey, peanut buttery, and easy to bake, this Peanut Butter Cup Dump Cake combines chocolate cake mix, creamy peanut butter, milk, chocolate chips, chopped peanut butter cups, oil, eggs, and vanilla into one sweet dessert. It bakes in a 9×13-inch dish until the center is set, then cools into soft, fudgy pieces packed with chocolate and peanut butter flavor.

Recipe Details

• Prep Time: 10 minutes
• Cook Time: 35 minutes
• Total Time: 45 minutes
• Course: Dessert
• Cuisine: American
• Servings: 12 pieces

Ingredients

For the Peanut Butter Cup Dump Cake

• 1 teaspoon vanilla extract
• 3 large eggs
• ½ cup vegetable oil
• 1 cup peanut butter cups, chopped
• 1 cup chocolate chips
• 1 cup milk
• 1 cup creamy peanut butter
• 1 box chocolate cake mix

Instructions

Step 1: Prepare the Oven and Baking Dish

Preheat the oven to 350°F (175°C). Grease a 9×13-inch baking dish so the cake releases more easily after baking.

Let the oven heat fully while you mix the batter. This dessert comes together quickly, so having the pan ready first keeps the process simple.

Step 2: Mix the Cake Batter

In a large bowl, combine the chocolate cake mix, creamy peanut butter, milk, vegetable oil, eggs, and vanilla extract. Mix until well combined.

The batter should look smooth and thick, with the peanut butter fully blended into the chocolate cake mixture. Scrape through the bowl as needed so no dry cake mix remains.

Step 3: Add the Chocolate and Peanut Butter Cups

Fold in the chocolate chips and chopped peanut butter cups. Stir gently until they are evenly distributed through the batter.

The chocolate chips add extra richness, while the chopped peanut butter cups give the cake sweet peanut butter pockets. Keep the mix-ins spread throughout so each piece gets some of both.

Step 4: Fill the Baking Dish

Pour the batter into the prepared 9×13-inch baking dish. Spread it evenly from edge to edge.

Smoothing the batter helps the cake bake more evenly. Make sure the chopped candy and chocolate chips are distributed across the pan.

Step 5: Bake Until Set

Bake for 30-35 minutes, or until a toothpick inserted in the center comes out clean. Check near the end of the baking time so the cake does not overbake.

The top should look set, and the center should be baked through. Once the toothpick comes out clean, remove the baking dish from the oven.

Step 6: Cool Before Serving

Let the cake cool before serving. Cooling helps the cake settle so it can be sliced into cleaner pieces.

Cut into 12 pieces once cooled. Serve as a rich chocolate peanut butter dessert.

Notes

• Store leftovers in an airtight container at room temperature for up to 3 days.

Serving Suggestions

Serve Peanut Butter Cup Dump Cake once it has cooled enough to slice. The chocolate cake mix, creamy peanut butter, chocolate chips, chopped peanut butter cups, milk, eggs, oil, and vanilla make each piece sweet, soft, and loaded with chocolate peanut butter flavor.

This cake makes 12 pieces, so it works well for dessert tables, casual family treats, potlucks, or simple chocolate cravings. Serve it plain, or enjoy it slightly warm if you prefer a softer texture.

For the best slices, let the cake cool before cutting. This helps the inside set and keeps the peanut butter cup pieces from making the cake too soft when portioning.

Storage

How to Store

Store leftovers in an airtight container at room temperature for up to 3 days. Keep the container sealed so the cake stays soft.

Peanut Butter Tip

Use 1 cup creamy peanut butter as listed. Mix it thoroughly into the cake batter so the peanut butter flavor spreads evenly.

Candy Tip

Use 1 cup chopped peanut butter cups. Fold them in gently with the chocolate chips so they stay distributed throughout the cake.

Chocolate Tip

Use 1 cup chocolate chips for extra richness. Stir them into the batter after the cake mix, peanut butter, milk, oil, eggs, and vanilla are combined.

Baking Tip

Bake at 350°F (175°C) for 30-35 minutes. The cake is ready when a toothpick inserted in the center comes out clean.

Cooling Tip

Let the cake cool before serving. This helps it set enough to cut into 12 pieces.