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Peanut Butter Earthquake Cake
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Reese's Peanut Butter Earthquake Cake

This Reese's Peanut Butter Earthquake Cake is a delicious and fun and wacky cake made of rich chocolate cake, a sweet peanut butter layer, chocolate chips, and Reese's Peanut Butter Cups. The cake may look like an earthquake, but the flavors will absolutely delight!
Prep Time20 mins
Cook Time55 mins
Course: Dessert
Cuisine: American
Servings: 12
Author: Jill


  • 1 chocolate cake mix plus ingredients needed to prepare (eggs, oil, water)
  • 1/2 cup butter melted
  • 8 ounce package cream cheese softened
  • 1/2 cup peanut butter
  • 1/2 teaspoon vanilla extract
  • 4 cups powdered sugar
  • 1/2 cup semi-sweet chocolate chips
  • 1 cup mini Reese’s Peanut Butter Cups halved


  • Preheat oven to 350F degrees. Grease a 9x13-inch glass baking dish with non-stick cooking spray.
  • Prepare chocolate cake mix according to package instructions and pour into the prepared 9x13-inch baking dish; set aside (do not bake yet).
  • In a large mixing bowl, beat the butter and cream cheese together with an electric mixer until smooth (at first it will look “globby” but keep beating until it is smooth and creamy).
  • Add the peanut butter and vanilla extract and beat until smooth.
  • Add one cup of powdered sugar at a time to bowl and mixing well until fully incorporated and mixture becomes light and fluffy.
  • Scoop the peanut butter mixture on top of the unbaked chocolate cake batter. Sprinkle with the semi-sweet chocolate chips and peanut butter cups over top of the peanut butter layer.
  • Bake the cake for 45-55 minutes or until the center of the cake is set. Cool slightly before serving.