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This Peanut Butter Cup Dump Cake Recipe is for the nights when you want a warm chocolate dessert without frosting a layer cake or washing a stack of bowls. The center bakes up soft and fudgy, while the top gets buttery around the edges with little pockets of melted peanut butter cup.
I like it best served warm, when the chocolate is still glossy and the peanut butter smells toasted. A scoop of vanilla ice cream is not required, but it makes the whole thing taste like a diner brownie sundae.
Chocolate Peanut Butter Lineup
This dessert is built from pantry shortcuts, so the small details matter. Use creamy peanut butter that melts smoothly, a moist chocolate cake mix, and peanut butter cups that you would happily eat on their own.
- Chocolate pudding mix. Creates the fudgy base that keeps the cake soft underneath.
- Whole milk. Hydrates the pudding and gives the bottom layer enough moisture to bake properly.
- Devil's food cake mix. Forms the chocolate cake topping without measuring flour or cocoa.
- Unsalted butter. Soaks into the dry cake mix and helps the top bake up rich and crumbly.
- Creamy peanut butter. Adds salty peanut flavor and melts into streaks through the warm cake.
- Peanut butter cups. Bring the candy-shop flavor with soft chocolate edges and creamy centers.
- Chocolate chips. Add extra pockets of melted chocolate across the top.
- Flaky salt. Balances the sweetness and makes the peanut butter taste stronger.
Peanut Butter Cup Dump Cake Recipe Method
- Heat the oven. Set the oven to 350°F and grease a 9x13-inch baking dish so the sticky chocolate edges release cleanly.
- Make the pudding base. Whisk the pudding mix and milk in the baking dish until smooth and slightly thickened, then spread it into an even layer.
- Add candy and peanut butter. Scatter most of the chopped peanut butter cups over the pudding and drizzle half of the warm peanut butter on top.
- Cover with cake mix. Sprinkle the dry cake mix evenly over the surface. Do not stir it into the pudding.
- Finish the top. Drizzle melted butter slowly over the dry mix, then add chocolate chips, the remaining peanut butter cups, and the rest of the peanut butter.
- Bake until bubbling. Bake for 38-42 minutes, until the edges bubble and the top has only a few small dry spots. Rest for 15 minutes before serving.
Keep The Layers Separate
The one rule that makes a dump cake work is simple. Stir the wet base, then stop stirring. Once the dry cake mix goes on top, it needs to stay there so steam from the pudding can rise through it while the butter melts down from above.
If you mix everything together, the texture turns heavy and pasty instead of gooey underneath with a tender top. Southern Living gives the same warning in its dump cake mixing guide. For another easy pan dessert with the same low-effort comfort, try this pecan pie dump cake.
Candy Pieces That Melt Right
Mini peanut butter cups are easiest because they scatter well, but chopped full-size cups work too. Cold candy is cleaner to cut and holds its shape long enough to create soft pockets instead of disappearing completely. I freeze the cups while the oven heats, then chop them right before adding them to the pan.
For a stronger peanut flavor, use a thick, conventional creamy peanut butter. Natural peanut butter can separate in the oven and leave oily patches. If you want a candy-bar dessert that leans even harder into the same flavor, the peanut butter cup lava cupcakes are a good next bake.
Bake For Gooey, Not Dry
This cake should not come out looking like a neat sheet cake. The edges should bubble, the top should look mostly set, and the center should jiggle just a little when you move the pan. That soft middle firms as it rests.
Let it stand for at least 15 minutes before scooping. Straight from the oven, the pudding layer is too loose and the candy is lava-hot. After a short rest, you get cleaner spoonfuls with fudgy chocolate on the bottom and buttery crumb on top.
Easy Swaps And Add-Ins
Chocolate cake mix is the classic choice, but yellow cake mix gives a sweet peanut butter blondie flavor. Add chopped roasted peanuts for crunch, or scatter peanut butter chips over the top if you want it sweeter. A handful of crushed chocolate sandwich cookies also works, especially if you like a darker crumb.
You can make it richer by replacing 1/2 cup of the milk with evaporated milk. I would not use all cream because the pudding base can turn too dense. For more peanut butter and chocolate ideas, see the peanut butter chocolate cake or these fudgy peanut butter brownies.
Storage And Reheating
Cover leftovers and refrigerate them for up to 4 days. The USDA recommends refrigerating perishable leftovers within 2 hours, which is a good habit for rich desserts with dairy too. Their leftovers safety guide is worth bookmarking.
Warm servings gently in the microwave until the chocolate softens. If you prefer clean squares, chill the cake fully and cut it cold. The texture becomes dense and fudgy, almost like a peanut butter cup brownie.
Summary
Serve this dump cake warm from the pan, or chill the leftovers and slice them into dense, candy-studded squares the next day.
FAQs
- Can I use regular size peanut butter cups instead of minis?
Yes. Chop regular peanut butter cups into small pieces so they melt into the cake instead of sinking in large chunks. Freeze them for 10 minutes first if your kitchen is warm.
- Do I mix the cake mix into the pudding?
No. Stir the pudding base with the milk, then sprinkle the dry cake mix over it. Keeping the layers separate helps the bottom stay gooey and the top bake into a buttery crumb.
- Can I make this peanut butter cup dump cake ahead?
You can bake it a day ahead and keep it covered in the refrigerator. Reheat individual servings in the microwave for 15-25 seconds, or warm the pan loosely covered in a 300°F oven until soft.
- What cake mix works best?
Devil's food cake mix gives the deepest chocolate flavor. Regular chocolate cake mix also works. Avoid mixes with pudding already added if you want a lighter top, because the dessert is already rich.
- Can I make it without peanut butter?
You can skip the peanut butter drizzle and use only chopped peanut butter cups. The cake will taste more chocolate-forward and a little less salty, so a small pinch of salt over the pudding layer helps.
- How do I know when dump cake is done?
The edges should bubble and the top should look set with no large dry floury patches. The center will still be soft, so do not wait for it to test like a regular cake.
- What should I serve with it?
Vanilla ice cream is the easiest match because it cuts the richness. Whipped cream, cold milk, or a few sliced bananas also work well with the chocolate and peanut butter.
