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Handheld smartphone photo of a freshly baked chocolate peanut butter dump cake served in a clear glass rectangular baking dish showing aerated set edges and a gooey center.

Chocolate Peanut Butter Dump Cake: The Ultimate Gooey Dessert

An incredibly decadent and effortless Chocolate Peanut Butter Dump Cake featuring an intensely fudgy chocolate base, luxurious creamy peanut butter swirls, and glossy semi-sweet chocolate chips baked to gooey perfection.
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Prep Time 10 minutes
Cook Time 35 minutes
Total Time 45 minutes
Servings: 12 slices
Course: Dessert
Cuisine: American
Calories: 395
Ingredients Equipment Method Notes

Ingredients
  

Cake Base & Mixes
  • 1 box (15.25 oz / 432g) Dark Chocolate or Devil's Food Cake Mix Provides the rich cocoa foundation.
  • 1 box (3.9 oz / 110g) Instant Chocolate Pudding Mix Guarantees a moist, ultra-fudgy, and gooey center.
  • 1.5 cups (360ml) Whole Milk Hydrates the dry cake mix and pudding powder evenly.
  • 1/2 cup (115g) Unsalted Butter Melted; helps create perfectly set, aerated outer edges.
  • 1 cup (250g) Creamy Peanut Butter Warmed slightly to create thick, dramatic swirls across the top.
  • 1 cup (170g) Semi-Sweet Chocolate Chips Scattered over the surface for glossy, partially melted pockets of flavor.

Equipment

  • 1 9x13-inch clear glass rectangular baking dish Allows easy visual monitoring of the gooey center and set edges.
  • 1 Whisk or fork For blending the dry mixes and combining the liquid layer.

Method
 

Preparation and Layering
  1. Preheat your conventional oven to 350°F (177°C) and grab a 9x13-inch (23x33 cm) clear glass rectangular baking dish.
  2. Empty the dark chocolate cake mix and instant chocolate pudding mix directly into the dish, whisking together until evenly blended.
  3. Pour the whole milk and melted unsalted butter directly over the dry layer. Stir gently with a fork to ensure all dry pockets are thoroughly moistened.
  4. Warm the creamy peanut butter for 20-30 seconds until fluid. Drop by the spoonful across the top and drag a butter knife through to create thick tan swirls.
  5. Scatter the semi-sweet chocolate chips evenly across the surface. Bake for 30 to 35 minutes until the edges are aerated and set, while the center remains incredibly moist and gooey.

Notes

Avoid using natural oil-separated peanut butter as it can turn greasy under high heat.
Check the corners of your clear glass baking dish for dry flour pockets before baking.