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Reese’s Peanut Butter Earthquake Cake Recipe

4.5 from 141 reviews

A decadent, rich chocolate and peanut butter cake with a gooey, layered center, topped with chopped Reese’s Peanut Butter Cups for an indulgent, nostalgic dessert experience.

Ingredients

Scale

Cake Batter

  • 1 box (450 g) chocolate cake mix
  • 1 cup (240 ml) water
  • 1/2 cup (120 ml) vegetable oil (can substitute with melted coconut oil)
  • 3 large eggs

Peanut Butter Swirl

  • 1 cup (250 g) creamy peanut butter
  • 8 oz (226 g) cream cheese, softened
  • 1/2 cup (115 g) unsalted butter, melted
  • 4 cups (480 g) powdered sugar
  • 1 tsp vanilla extract

Toppings

  • 1 cup (170 g) Reese’s Peanut Butter Cups, chopped
  • Optional: extra Reese’s peanut butter cups or chocolate chips for garnish

Instructions

  1. Preheat and Prepare: Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking dish thoroughly with butter or non-stick spray to prevent sticking.
  2. Mix Cake Batter: In a large bowl, combine the chocolate cake mix, water, vegetable oil, and eggs. Using an electric mixer at medium speed, blend until smooth and well combined, about 2 minutes.
  3. Prepare Peanut Butter Swirl: In a separate bowl, mix the creamy peanut butter, softened cream cheese, melted butter, powdered sugar, and vanilla extract until smooth and creamy with no lumps.
  4. Assemble Cake Layers: Pour the cake batter evenly into the prepared baking dish. Drop spoonfuls of the peanut butter mixture over the batter, then use a knife or spatula to swirl it gently throughout the batter, creating marbled pockets.
  5. Add Toppings: Evenly sprinkle the chopped Reese’s Peanut Butter Cups on top of the swirled batter.
  6. Bake: Place the baking dish in the oven and bake for 35-40 minutes, or until a toothpick inserted into the center comes out with moist crumbs but no raw batter.
  7. Cool and Serve: Remove the cake from the oven and allow it to cool slightly in the pan, about 10 minutes. Serve warm or at room temperature. Optional: dust with powdered sugar or serve with vanilla ice cream and chocolate sauce for extra indulgence.

Notes

  • For a richer chocolate flavor, use a dark chocolate cake mix.
  • Store leftovers in an airtight container at room temperature for up to 3 days.
  • Use room temperature ingredients for a smoother batter and better texture.
  • Do not overmix the batter to keep the cake light and fluffy.
  • You can substitute crunchy peanut butter for creamy for added texture.
  • Try adding a tablespoon of cocoa powder to intensify the chocolate flavor.
  • Allow the cake to cool properly to help the gooey center set.
  • For a fun variation, experiment with different chocolate chip types or swap Reese’s for other candy bars like Snickers.

Keywords: Reese’s, Peanut Butter Cake, Chocolate Cake, Earthquake Cake, Dessert, Indulgent Cake, Peanut Butter Cups