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Peanut Butter Truffle Chocolate Cake
Areeba

Peanut Butter Truffle Chocolate Cake

This peanut butter truffle chocolate cake is a rich, indulgent dessert made with moist chocolate cake layers, a creamy peanut butter truffle filling, and smooth chocolate icing. It’s the perfect combination of deep chocolate flavor and creamy peanut butter richness, making it ideal for birthdays, celebrations, or special occasions. With simple ingredients and a little chilling time, it delivers a bakery-style cake right from your home kitchen.
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Prep Time 5 hours
Cook Time 35 minutes
Total Time 5 hours 35 minutes
Servings: 12
Course: Dessert
Cuisine: American
Ingredients Method Notes

Ingredients
  

Chocolate Cake
  • 1 cup all-purpose flour
  • 1 cup granulated sugar
  • ¼ cup + 2 tbsp dark cocoa powder
  • 1 tsp baking soda
  • ½ tsp salt
  • 1 large egg
  • ½ cup buttermilk
  • ½ cup vegetable oil
  • ¾ tsp vanilla extract
  • ½ cup boiling water
Peanut Butter Truffle
  • 20 oz peanut butter chips
  • 2 ¼ cups heavy whipping cream
  • 1 cup 8 oz mascarpone cheese
Chocolate Icing
  • ¼ cup shortening
  • ¼ cup butter
  • 2 cups powdered sugar
  • ¼ cup dark cocoa powder
  • 2 –3 tsp water as needed for consistency

Method
 

  1. Preheat oven to 300°F (150°C). Prepare a 9-inch pan with parchment paper and greased sides.
  2. Whisk dry ingredients for the cake in a bowl.
  3. Add egg, buttermilk, and oil; mix until smooth.
  4. Add vanilla to boiling water, then mix into batter.
  5. Pour into pan and bake for 33–35 minutes. Cool completely.
  6. For truffle, pour hot cream over peanut butter chips. Cover 5–7 minutes, then whisk smooth.
  7. Chill until thickened, then mix in mascarpone cheese.
  8. Level cake, place in springform pan, and line sides with parchment.
  9. Spread truffle layer over cake and chill 3–4 hours.
  10. Beat icing ingredients until smooth and pipeable.
  11. Decorate cake with icing and chocolate drizzle.
  12. Chill until ready to serve; let sit 15–20 minutes before slicing.

Notes

This peanut butter truffle chocolate cake needs proper chilling time to set the layers correctly, so don’t rush the process. The cake must be completely cool before adding the truffle layer, otherwise the filling can melt and lose its structure. For best results, chill the cake for several hours or overnight so the truffle becomes firm, rich, and sliceable.
If you want a slightly less sweet version, you can reduce the powdered sugar in the icing or use dark chocolate for a deeper flavor. Also, letting the cake sit at room temperature for 15–20 minutes before serving gives the truffle layer a smooth, creamy texture that melts beautifully in every bite.