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Reese's Peanut Butter Cup Earthquake Cake

This gooey, over-the-top cake combines chocolate fudge cake, swirls of peanut butter cream cheese, and melty Reese's cups in a chaotic, delicious masterpiece. It's a low-effort, high-reward dessert that always steals the spotlight.
Prep Time 15 minutes
Cook Time 40 minutes
Total Time 55 minutes

Ingredients
  

  • 1 box chocolate fudge cake mix plus ingredients listed on the box: eggs, oil, water
  • 8 oz cream cheese softened
  • ½ cup unsalted butter melted
  • cups powdered sugar
  • 1 teaspoon vanilla extract
  • 1 cup creamy peanut butter
  • cups chopped Reese’s Peanut Butter Cups plus extra for topping
  • ½ cup mini chocolate chips
  • Optional: pinch of salt if your peanut butter is unsalted

Instructions
 

  • Grease a 9x13-inch pan and preheat your oven to 350°F (175°C). Prepare the chocolate cake mix according to box instructions and pour it into the pan.
  • In a separate bowl, beat the cream cheese until smooth. Add melted butter, vanilla, and peanut butter, and mix well. Slowly beat in the powdered sugar until thick and creamy.
  • Dollop the peanut butter mixture over the cake batter. Use a knife to swirl it lightly through—don’t overdo it. You want pockets of cream cheese in the final bake.
  • Scatter the chopped Reese’s and mini chocolate chips all over the top. Add a few extra dollops of cream cheese mixture if there’s any left.
  • Bake for 35–45 minutes. The cake is done when the edges are set and the center still has a little jiggle. It will crack and bubble as it bakes—don’t worry, that’s the signature earthquake look.
  • Let cool for at least 20 minutes before slicing. Serve warm for gooey texture or chill for a fudgier bite.