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Reese’s Peanut Butter Earthquake Cake
Sarah namedy

Reese’s Peanut Butter Earthquake Cake

This rich and gooey Reese’s Peanut Butter Earthquake Cake is a chocolate lover’s dream — swirled with creamy peanut butter filling, studded with Reese’s cups, and baked to molten perfection. Perfect for parties or indulgent nights in!
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Prep Time 15 minutes
Cook Time 40 minutes
Total Time 55 minutes
Servings: 12 squares
Course: Dessert
Cuisine: American
Calories: 610
Ingredients Equipment Method Notes

Ingredients
  

  • 1 box chocolate cake mix
  • 1 cup water
  • 0.5 cup vegetable oil
  • 3 large eggs
  • 1 cup creamy peanut butter
  • 8 oz cream cheese, softened
  • 0.5 cup unsalted butter, melted
  • 4 cups powdered sugar
  • 1 tsp vanilla extract
  • 1 cup Reese’s Peanut Butter Cups, chopped

Equipment

  • 9x13-inch baking dish
  • Large mixing bowls
  • electric mixer or whisk
  • Spatula
  • knife
  • Oven

Method
 

  1. Preheat oven to 350°F (175°C). Grease a 9×13-inch baking dish.
  2. In a large bowl, mix the chocolate cake mix, water, vegetable oil, and eggs until well combined. Pour the batter into the prepared baking dish.
  3. In a separate bowl, combine the peanut butter, cream cheese, melted butter, powdered sugar, and vanilla extract. Mix until smooth.
  4. Drop spoonfuls of the peanut butter mixture over the cake batter. Use a knife to swirl the peanut butter mixture into the batter.
  5. Sprinkle the chopped Reese’s Peanut Butter Cups evenly over the top.
  6. Bake for 35–40 minutes, or until a toothpick inserted into the center comes out mostly clean.
  7. Allow the cake to cool slightly before serving. Enjoy warm or at room temperature.

Notes

For extra peanut butter flavor, drizzle melted Reese’s chips over the cooled cake. You can substitute chocolate chunks or peanut butter chips for the Reese’s cups. Store leftovers covered at room temperature for up to 3 days or refrigerate for a fudgier texture.