Peanut Butter Fudge Cake

We've added so much chocolate to a devil's food cake mix that no one will ever guess it came from a box. Chopped peanut butter cups are stirred into the batter and the frosting is a luscious blend of dark chocolate, heavy cream, and peanut butter.

Peanut Butter Fudge Cake
Servings: 16 Prep 15 mins Bake 350°F 50 mins Chill 1 hr


  • 1 box (18.25 ounces) devils food cake mix
  • 3 eggs
  • 1 cup buttermilk
  • 1/2 cup vegetable oil
  • 2 cups chopped chocolate-covered peanut butter cups (about 8 ounces), plus more to garnish
  • 8 ounces dark chocolate, chopped
  • 1 cup heavy cream
  • 1/2 cup creamy peanut butter

Make It

1. Heat oven to 350 degrees F. Coat two 9-inch round cake pans with nonstick cooking spray. Line with parchment or waxed paper; coat paper.

2. In a large bowl, beat cake mix, eggs, buttermilk and vegetable oil on low for 30 seconds. Increase speed to medium-high; beat for 2 minutes, scraping down side of the bowl after 1 minute. Fold in 2 cups of the chopped peanut butter cups.

3. Divide batter between prepared pans. Bake at 350 degrees F for about 34 minutes, or until a toothpick inserted in the center comes out clean. Let layers cool on a wire rack for 15 minutes. Turn out cakes onto wire racks and cool completely.

4. Place chopped dark chocolate in a medium-size bowl. Bring cream just to a boil and pour over chocolate. Whisk until chocolate melts. Add peanut butter and whisk until smooth.

5. Trim top of cake layers flat with a serrated knife. Put 1 cake layer on cooling rack and place on a baking sheet. Pour 1 cup frosting on top; spread evenly with a spatula. Top with remaining cake layer. Pour remaining frosting over the top, allowing it to spill over the sides. Smooth top and sides with spatula. Refrigerate 1 hour to set. Transfer cake to serving plate and garnish with chopped candy, if desired.

Nutrition Facts

Servings Per Recipe: 16; Amount Per Serving: cal. (kcal): 470, Fat, total (g): 30, chol. (mg): 62, sat. fat (g): 11, carb. (g): 44, fiber (g): 2, pro. (g): 8, sodium (mg): 365, Percent Daily Values are based on a 2,000 calorie diet.