Peanut Butter Cup Dump Cake

I like making this peanut butter cup dump cake when I want a rich dessert without a lot of steps. I usually make it for weekends or when I know people will be around for leftovers. It tastes thick and chocolatey, with a soft peanut butter middle and gooey chocolate on top.

Step by Step Method

Prepare the Pan and Oven

I start by heating the oven to 350°F so it is ready when the batter is done. I line a 9×9-inch baking pan with parchment paper, making sure the paper hangs over the sides. This makes it much easier to lift the cake out later without breaking the layers.

Make and Bake the Brownie Base

Next, I mix the brownie batter using the directions on the box. I stir just until everything comes together and the batter looks smooth and thick. I spread the batter evenly in the pan, smoothing the top so it bakes level. I bake it until the edges look set but the center is still soft. When I test it, the toothpick should come out with moist crumbs, not raw batter. This keeps the base fudgy instead of dry.

Mix the Peanut Butter Cream Layer

While the brownie layer is baking or cooling slightly, I beat the softened cream cheese and peanut butter together. I keep mixing until it looks smooth and creamy with no lumps. Then I mix in the powdered sugar, followed by the egg. I stop mixing as soon as everything is blended, because overmixing can make the layer too loose.

Add the Peanut Butter Layer and Bake Again

Once the brownie layer is warm but not hot, I gently spread the peanut butter mixture on top. The layer should be thick and pale and cover the brownie evenly. I return the pan to the oven and bake until the top looks set and does not jiggle when the pan is moved. The center should feel firm but still soft to the touch.

Cool and Chill the Cake

After baking, I let the cake cool at room temperature first. Then I place it in the fridge for at least two hours. This step is important because it helps the layers firm up and makes clean slicing possible.

Add Toppings and Chocolate Drizzle

Once chilled, I sprinkle the peanut butter cups, chocolate chunks, and peanuts over the top. I warm the heavy cream and pour it over the chocolate chips, letting it sit for a minute before stirring until smooth and shiny. I drizzle the chocolate over the cake, letting it drip down the sides before lifting it out of the pan and cutting it into large squares.

Why You Will Love This Recipe

This recipe gives you thick, bakery-style bars without complicated steps. The layers stay clear and hold their shape, so every slice looks and tastes rich. It is easy to make ahead, and the texture gets even better after chilling.

Luna Hossain

Peanut Butter Cup Dump Cake

This recipe is for a rich, layered peanut butter cup dump cake that’s simple to make and great for sharing. It starts with a boxed brownie base baked until fudgy. A smooth peanut butter–cream cheese layer is spread on top and baked again until set. After cooling, the cake is chilled so the layers firm up for clean slices. It’s finished with peanut butter cups, chocolate, peanuts, and a warm chocolate drizzle. The result is thick, bakery-style bars with a soft peanut butter center, gooey chocolate topping, and a deep chocolate flavor, and it can be made ahead for even better texture.

Calories: ~520 | Fat: ~32g | Carbs: ~52g | Protein: ~10g

Print Recipe Pin Recipe

Prep Time 15 minutes mins

Cook Time 45 minutes mins

Total Time 1 hour hr

Servings: 9 Large Squares

Course: Easy Cakes

Cuisine: American

Calories: 520

Ingredients Equipment Method Notes

Ingredients

  

• 1 box chocolate brownie mix
• Ingredients listed on the brownie box usually eggs, oil, and water
• 8 oz cream cheese softened
• 1/2 cup creamy peanut butter
• 1/2 cup powdered sugar
• 1 large egg
• 1 to 1 1/2 cups peanut butter cups chopped or halved
• 1/2 cup chocolate chunks or chocolate pieces
• 1/3 cup peanuts optional, but visible on top
• 1/2 cup chocolate chips
• 1/4 cup heavy cream

Equipment

• 9×9-inch baking pan
• Parchment paper
• Mixing bowls
• Hand mixer or sturdy spoon
• Measuring cups
• Spatula
• Small saucepan or microwave-safe bowl

Method

 

1. Heat the oven to 350°F and line the pan with parchment paper. The paper should hang over the sides so the cake can be lifted out later.
2. Mix the brownie batter using the box directions. The batter should be smooth and thick.
3. Spread the brownie batter evenly in the pan. The surface should look level and glossy.
4. Bake until just set but still soft in the middle. A toothpick should come out with moist crumbs, not wet batter.
5. Beat the cream cheese and peanut butter until smooth. The mixture should look creamy with no lumps.
6. Mix in the powdered sugar, then the egg. Stop mixing as soon as it looks blended.
7. Spread the peanut butter mixture over the warm brownie layer. It should form a thick, pale layer.
8. Bake again until the top looks set and does not jiggle. The center should feel firm but soft when touched.
9. Let the cake cool, then chill for at least 2 hours. This helps the layers hold together when cutting.
10. Sprinkle peanut butter cups, chocolate chunks, and peanuts on top. The top should look full and uneven.
11. Heat the cream and pour it over the chocolate chips. Stir until smooth and shiny.
12. Drizzle the chocolate over the cake. Let it drip down the sides before slicing.

Notes

Do not overbake the first brownie layer or it will turn dry. Make sure the cream cheese is soft, or the peanut butter layer can turn lumpy. Let the cake chill before cutting, or the layers may slide.

Macro counts are rough estimates and will vary by brand and portion size.

Why This Recipe Works

The brownie base is baked first so it stays dense and fudgy. The peanut butter layer bakes just enough to set, which keeps it creamy instead of runny. Cooling the cake lets the layers firm up, so the bars cut clean and stay tall.

Serving Suggestions

I usually serve this cold or slightly cool so the layers stay firm. A fork is helpful because the bars are thick. A glass of milk or plain coffee goes well with it.

Fun Fact

Peanut butter and chocolate melt at different speeds, which is why this cake keeps clear layers instead of blending together.

Conclusion

This dump cake keeps well in the fridge for a few days. I like cutting it into big squares and adding fresh chocolate drizzle before serving. It is easy to change the toppings, but I usually stick with peanut butter cups.

Luna Hossain