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Reese’s Peanut Butter Cookie Cake Recipe

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★★★★★

4.8 from 135 reviews

This Reese’s Peanut Butter Cookie Cake combines a rich, chewy peanut butter cookie base loaded with chopped Reese’s peanut butter cups and chocolate chips, topped with a smooth, chocolatey cocoa buttercream frosting. Perfect for peanut butter lovers, this dessert is baked in a 9-inch pan and decorated with halved Reese’s for an irresistible treat that’s both fun and indulgent.

Ingredients

Scale

Cookie Cake

  • 1 1/2 cups (195g) all-purpose flour
  • 3/4 tsp baking soda
  • 1/2 tsp salt
  • 1/2 cup (112g) unsalted butter, room temperature
  • 1/2 cup (140g) peanut butter
  • 1/2 cup (104g) granulated sugar
  • 1/2 cup (112g) packed light brown sugar
  • 1 large egg
  • 1 tsp vanilla extract
  • 1/2 cup (80g) chopped peanut butter cups (4–5 full-sized Reese’s)
  • 3/4 cup (127g) semi-sweet chocolate chips

Buttercream Frosting

  • 1/2 cup (112g) unsalted butter, room temperature
  • 2 cups (260g) powdered sugar
  • 1/4 cup (29g) natural unsweetened cocoa powder
  • 1/2 tsp vanilla extract
  • 1–2 tbsp heavy whipping cream
  • 4–5 full-sized Reese’s, cut in half

Instructions

  1. Preheat Oven and Prepare Pan: Preheat your oven to 350°F (180°C). Line a 9-inch cake pan with parchment paper at the bottom and spray the sides with baking spray. Set aside to prepare the batter.
  2. Mix Dry Ingredients: In a medium bowl, whisk together the all-purpose flour, baking soda, and salt. Set aside so that the leavening can evenly distribute.
  3. Cream Butter, Peanut Butter, and Sugars: In a large mixing bowl, cream the unsalted butter, peanut butter, granulated sugar, and brown sugar together on medium speed for 2-3 minutes until the mixture becomes light in color and fluffy. Scrape down the sides of the bowl to ensure everything is incorporated evenly.
  4. Add Egg and Vanilla: Beat in the egg followed by the vanilla extract until fully combined and smooth.
  5. Incorporate Dry Ingredients: Gradually add the dry ingredients to the wet mixture and mix just until the dough comes together. Be careful not to overmix to retain the chewy texture.
  6. Fold in Chocolate and Reese’s: Stir in the chopped peanut butter cups and semi-sweet chocolate chips until they are evenly distributed throughout the dough.
  7. Shape Dough in Pan: Press the cookie dough evenly into the prepared cake pan. Optionally, press additional chocolate chips or chopped Reese’s on top for decoration and extra texture.
  8. Bake the Cookie Cake: Bake in the preheated oven for 18-22 minutes, or until the edges are golden brown and the center looks just set—avoid overbaking to keep it soft.
  9. Cool the Cookie Cake: Remove from the oven and allow the cookie cake to cool completely in the pan. Once fully cooled, invert onto a cooling rack. Place another cooling rack on top and flip it right side up for a neat presentation.
  10. Make the Buttercream: In a large mixing bowl, beat the butter until smooth. Add 1 cup of powdered sugar and mix until combined. Then, add the cocoa powder and vanilla extract and mix thoroughly. Incorporate one tablespoon of heavy whipping cream and mix well.
  11. Finish Buttercream Consistency: Add the remaining powdered sugar and beat until the buttercream is smooth and well combined. If needed, add an additional tablespoon of cream for desired piping consistency.
  12. Decorate the Cookie Cake: Pipe swirls of buttercream around the edges of the cookie cake. Place halved Reese’s cups between each swirl to decorate.
  13. Storage and Serving: Store the cake in an airtight container. It can be kept at room temperature for up to 2 days but refrigerate afterward due to the buttercream. Serve at room temperature and best enjoyed within 4-5 days.

Notes

  • Do not overmix the cookie dough to avoid a tough texture.
  • Ensure the cookie cake is fully cooled before inverting to prevent breakage.
  • Use room temperature butter for easier creaming and smoother buttercream.
  • Adjust heavy cream in buttercream to achieve perfect piping consistency.
  • Store leftover cookie cake refrigerated after 2 days because of the perishable buttercream.
  • Best served at room temperature for optimal flavor and texture.

Keywords: Reese's cookie cake, peanut butter cookie cake, chocolate peanut butter dessert, cookie cake recipe, peanut butter cups dessert

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