Dark Chocolate Peanut Butter Cup Cake

This cake! Two layers of moist, dark chocolate cake are covered with creamy peanut butter frosting, ganache, and chopped dark chocolate peanut butter cups. 

Dark Chocolate Peanut Butter Cup Cake 1

Today is not like any other day. Today, March 25th, is Chocolate-Peanut Butter Day 2.0 hosted by Carla of Chocolate Moosey and Miriam of Overtime Cook!! The 2.0 is because this is our second year of celebrating the best combination ever and we have 27 different bloggers participating this year and the list of all their chocolate-peanut butter recipes are at the end of this post. But first, I made cake!

Dark Chocolate Peanut Butter Cup Cake 2


After raving about the chocolate lover’s cupcakes I made despite normally not enjoying chocolate on chocolate, I decided to do it right with peanut butter for my peanut butter loving soul. This time however I turned it into an epic cake. Two dark chocolate layer cakes are bound together with a creamy peanut butter frosting and then covered with a dark chocolate-peanut butter ganache. And in case you were unaware of the inspiration for this cake, it’s all topped off with chopped dark chocolate peanut butter cups.

Dark Chocolate Peanut Butter Cup Cake 3

One year ago: Mini Chocolate Caramel Peanut Butter Cheesecakes

Two years ago: Creamy Tomato Tortellini Soup

Four years ago: Banana Pecan Waffles

DARK CHOCOLATE PEANUT BUTTER CUP CAKE

Serves 12-16

Ingredients:

CAKE

2 oz. dark chocolate, chopped

1/2 cup dark cocoa powder

1 cup hot milk

2 cups all-purpose flour

2 cups sugar

2 tsp baking powder

1-1/2 tsp baking soda

1 tsp salt

6 Tbsp vegetable oil

2 eggs, room temperature

2 tsp vanilla extract

1/2 cup boiling water

FROSTING

1 cup (2 sticks) unsalted butter, room temperature

2/3 cup creamy peanut butter

Pinch salt

1-1/2 tsp vanilla extract

4 cups powdered sugar

1/4 cup heavy cream

8 mini dark chocolate peanut butter cups, chopped

GANACHE

6 oz. dark chocolate, chopped

1/4 cup creamy peanut butter

1/2 cup heavy cream

TOPPING

12 mini dark chocolate peanut butter cups, quartered

Directions:

  1. For the cake: Preheat oven to 350 degrees. Light coat two 9-inch cake pans with nonstick spray or butter and lightly flour. Set aside.
  2. Place the chopped chocolate and cocoa powder in a medium bowl. Pour the hot milk over the mixture and whisk until smooth. Refrigerate mixture for 20 minutes.
  3. In a large bowl, whisk together the flour, sugar, baking powder, baking soda, and salt. Using a hand or stand mixer on medium speed, add cooled chocolate mixture, vegetable oil, eggs, and vanilla. Mix together until well combined. Reduce speed and carefully add boiling water to the cake batter. Beat on high speed for about 1 minute to add air to the batter.
  4. Distribute cake batter evenly between the two prepared cake pans. Bake for 30-35 minutes, until a toothpick or cake tester inserted in the center comes out clean.
  5. Remove from the oven and allow to cool for 10 minutes. Remove from pans and allow to cool completely on wire rack. If needed, slice off the tops of the cakes to make them level.
  6. For the frosting: While the cake cools, prepare the frosting. In a large bowl, beat the butter, peanut butter, salt, and vanilla together until smooth. On low speed, mix in the confectioners’ sugar until just incorporated, followed by the vanilla and cream. Increase the mixer speed to medium-high and whip until light and very fluffy, about 4 minutes.. Add more powdered sugar or heavy cream if necessary to reach desired consistency.
  7. Remove 1/4 of the frosting into a small bowl and stir in the mini peanut butter cups.
  8. One the cakes are cool, place one onto a cake plate. Spread the layer of peanut butter cup-frosting on top followed by the second cake. Frost the entire cake with remaining frosting.
  9. For the ganache: Place the chocolate chips and peanut butter in a metal bowl. Microwave heavy cream for 1 minute or until it starts to boil and pour over chocolate chips. Cover bowl with saran wrap for 5-7 minutes. Whisk until smooth, allow to sit for a few minutes until it starts to thicken, then pour over the top of the cake. Decorate with remaining chopped peanut butter cups.

Source: Cake adapted from my Cookie Dough Oreo Cake. Frosting adapted from my Marble Malt Cake with Peanut Butter Malt Frosting.

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Feed the addiction and check out all these other great chocolate and peanut butter recipes:

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