Chocolate Peanut Butter Mousse ‘Box’ Cake Recipe

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Steve Pearson Modified: March 22, 2022
Chocolate Peanut Butter Mousse ‘Box’ Cake Recipe

How To Make Chocolate Peanut Butter Mousse ‘Box’ Cake

Layers of brownie, peanut butter, and chocolate mousse, makes this rich peanut butter mousse box cake a satisfyingly tasty sweet treat!

Preparation: 12 minutes
Cooking: 25 minutes
Freeze and Thaw Time: 1 day 35 minutes
Total: 1 day 1 hour 12 minutes

Serves:

Ingredients

For Brownie Layer:

  • 18ozbrownie mix,(1 package)
  • 2large eggs
  • ½cupvegetable oil
  • 3tbspwater

For Peanut Butter Mousse:

  • ½tspgelatin
  • 1tbspwater
  • 1cupsmooth peanut butter
  • ½cuppowdered sugar
  • cupswhipped cream

For Chocolate Mousse:

  • ½tspgelatin
  • 1tbspwater
  • cupschocolate chips
  • cupsheavy cream
  • cupswhipped cream
  • 6peanut butter cups,for serving

Instructions

  1. Preheat the oven to 325 degrees F.

Brownie Layer:

  1. In a large bowl, combine the brownie mix, eggs, vegetable oil, and water. Stir until the batter is smooth and thick.

  2. Pour the batter into an 8-inch springform pan and smooth the top with a spatula or knife.

  3. Bake for 25 minutes. Remove from the oven and use a spatula to press down the top. Let cool to room temperature.

Peanut Butter Mousse:

  1. In a small bowl, combine the gelatin and water, and set aside.

  2. In a large bowl, mix the peanut butter and powdered sugar until smooth and shiny.

  3. Microwave the gelatin mix for 10 seconds, then mix into the peanut butter until thick and lumpy.

  4. Gently fold in half of the whipped cream. Once incorporated, fold in the remaining whipped cream.

  5. Pour into the springform pan over the brownie base and smooth the top with a spatula or knife.

  6. Freeze for 20 minutes.

Chocolate Mousse:

  1. In a small bowl, combine the gelatin and water, and set aside.

  2. In a large bowl, combine the chocolate chips and heavy cream. Microwave in 20-second increments, stirring between each, until melted.

  3. Microwave the gelatin for 10 seconds, then add to the chocolate mixture.

  4. Gently fold in half of the whipped cream. Once incorporated, fold in the remaining whipped cream.

  5. Pour the batter into the springform pan over the peanut butter layer and smooth with a spatula or knife.

  6. Freeze overnight.

  7. Remove the cake from the freezer and release the springform. Cut the chocolate peanut butter cups into sixths and evenly place around the rim of the cake, or decorate as desired.

  8. Let the cake thaw for 15 minutes, then serve. Enjoy!

Nutrition

  • Calories: 1117.49kcal
  • Fat: 72.20g
  • Saturated Fat: 26.08g
  • Trans Fat: 0.17g
  • Monounsaturated Fat: 29.79g
  • Polyunsaturated Fat: 9.19g
  • Carbohydrates: 106.23g
  • Fiber: 4.03g
  • Sugar: 81.43g
  • Protein: 17.77g
  • Cholesterol: 107.89mg
  • Sodium: 388.38mg
  • Calcium: 138.79mg
  • Potassium: 386.09mg
  • Iron: 3.11mg
  • Vitamin A: 205.24µg
  • Vitamin C: 0.57mg
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