Reese’s Peanut Butter Cup Cake Recipe
Introduction
This Reese’s Peanut Butter Cup Cake is a rich, chocolatey treat with a creamy peanut butter frosting that perfectly balances sweet and salty flavors. It’s an easy-to-make dessert that’s sure to satisfy any chocolate and peanut butter lover’s cravings.

Ingredients
- 1 box chocolate cake mix
- Ingredients needed to make cake mix: eggs, oil, and water (as called for on the cake mix box)
- 1/2 cup (1 stick) margarine, softened to room temperature
- 3/4 cup Reese’s creamy peanut butter
- 2 cups powdered sugar
- 2 tablespoons milk
- 1 teaspoon vanilla extract
Instructions
- Step 1: Prepare the chocolate cake according to the instructions on the box, using the eggs, oil, and water called for, and bake it in a 9×13-inch pan. Let the cake cool completely before frosting.
- Step 2: In a mixing bowl, combine the softened margarine and Reese’s creamy peanut butter. Mix until smooth and creamy.
- Step 3: Gradually add the powdered sugar, milk, and vanilla extract to the peanut butter mixture. Mix until all ingredients are fully combined and the frosting is smooth.
- Step 4: Spread the frosting gently over the cooled cake, using a light hand to avoid tearing the cake surface.
- Step 5: Slice the cake into pieces and serve. Enjoy the rich combination of chocolate and peanut butter flavors!
Tips & Variations
- For a richer flavor, use real butter instead of margarine in the frosting.
- If you like a bit of crunch, sprinkle chopped Reese’s Peanut Butter Cups on top before serving.
- To make this cake gluten-free, use a gluten-free chocolate cake mix.
Storage
Store the cake in an airtight container in the refrigerator for up to 4 days. Bring to room temperature before serving for the best texture. You can also freeze the cake for up to 2 months; thaw overnight in the refrigerator before serving.
How to Serve

Serve this delicious recipe with your favorite sides.
FAQs
Can I use natural peanut butter instead of Reese’s creamy peanut butter?
Yes, but natural peanut butter may be less sweet and have a different texture, which can slightly change the frosting’s taste and consistency.
Do I need to refrigerate this cake?
Yes, because the frosting contains margarine and peanut butter, refrigerating helps keep the frosting fresh and firm. Let the cake sit at room temperature for a few minutes before serving for the best flavor.
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Reese’s Peanut Butter Cup Cake Recipe
- Total Time: 50 minutes
- Yield: 12 servings 1x
Description
This Reese’s Peanut Butter Cup Cake is a rich and indulgent dessert combining moist chocolate cake with a creamy peanut butter frosting inspired by the classic candy. Perfect for peanut butter and chocolate lovers alike, this cake is easy to prepare using a boxed chocolate cake mix and a homemade peanut butter frosting, making it a delightful treat for any occasion.
Ingredients
Cake
- 1 box chocolate cake mix
- Ingredients needed to make cake mix: eggs, oil, and water (as directed on the box)
Frosting
- 1/2 cup (1 stick) margarine, softened to room temperature
- 3/4 cup Reese’s creamy peanut butter
- 2 cups powdered sugar
- 2 Tablespoons milk
- 1 teaspoon vanilla extract
Instructions
- Prepare the Cake: Follow the instructions on the back of the chocolate cake mix box to prepare the batter using the required eggs, oil, and water. Pour into a 9×13-inch pan and bake as directed. Allow the cake to cool completely before frosting.
- Make the Frosting: In a mixing bowl, combine the softened margarine and Reese’s creamy peanut butter. Mix thoroughly until smooth and creamy.
- Add Sweeteners and Flavor: Gradually add powdered sugar, milk, and vanilla extract to the peanut butter mixture. Continue mixing until fully combined and smooth.
- Frost the Cake: Using a gentle hand, spread the peanut butter frosting evenly over the cooled cake. Avoid pulling or dragging the frosting to keep it smooth and soft.
- Serve: Slice the frosted cake into portions and serve. Enjoy the rich combination of chocolate and peanut butter flavors.
Notes
- Ensure the cake is completely cooled before frosting to prevent melting the frosting.
- You can substitute margarine with unsalted butter for a richer flavor.
- For a thicker frosting, add more powdered sugar as needed.
- If the frosting is too thick, add an extra teaspoon of milk at a time until desired consistency is reached.
- Store leftover cake covered at room temperature for up to 2 days or refrigerate for up to 5 days.
- Prep Time: 15 minutes
- Cook Time: 35 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American
Keywords: Reese’s peanut butter cup cake, chocolate cake, peanut butter frosting, easy cake recipe, chocolate peanut butter dessert

