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Chocolate Mousse Cake – Rich, Airy, and Elegantly Decadent


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  • Author: mounir
  • Total Time: 3 hours (including chilling time)
  • Yield: 12 servings
  • Diet: Vegetarian

Description

Chocolate Mousse Cake is a luxurious dessert featuring layers of moist chocolate cake and silky smooth chocolate mousse, topped with a glossy ganache — a decadent treat for true chocolate lovers.


Ingredients

  • For the Cake:
  • 1 cup all-purpose flour
  • ½ cup unsweetened cocoa powder
  • 1 teaspoon baking powder
  • ½ teaspoon baking soda
  • ¼ teaspoon salt
  • 2 large eggs
  • ¾ cup granulated sugar
  • ½ cup buttermilk
  • ¼ cup vegetable oil
  • ½ cup hot water or coffee
  • 1 teaspoon vanilla extract
  • For the Chocolate Mousse:
  • 6 ounces semisweet chocolate, chopped
  • 2 tablespoons butter
  • 2 cups heavy whipping cream (divided)
  • 2 tablespoons powdered sugar
  • 1 teaspoon vanilla extract
  • For the Ganache Topping:
  • 4 ounces dark chocolate, chopped
  • ½ cup heavy cream


Instructions

  1. Make the Cake: Preheat oven to 350°F (175°C). Grease and line two 8-inch round pans with parchment paper.
  2. In a bowl, whisk flour, cocoa, baking powder, baking soda, and salt. In another bowl, beat eggs, sugar, buttermilk, oil, and vanilla. Add dry ingredients and mix until smooth. Slowly pour in hot water or coffee and mix until combined (batter will be thin).
  3. Divide batter evenly between pans and bake for 25–30 minutes or until a toothpick comes out clean. Cool completely.
  4. Make the Mousse: Melt chocolate and butter together in a heatproof bowl over simmering water (or microwave in 30-second intervals). Cool slightly.
  5. Whip 1 ½ cups of cream with powdered sugar and vanilla until stiff peaks form. Gently fold in the melted chocolate mixture until smooth and fluffy. Chill for 30 minutes to firm up.
  6. Assemble the Cake: Place one cake layer on a serving plate. Spread a thick layer of chocolate mousse over it. Add the second cake layer and cover the top and sides with the remaining mousse. Smooth the surface and chill for 1 hour.
  7. Make the Ganache: Heat ½ cup cream until steaming. Pour over chopped dark chocolate and let sit for 2 minutes, then stir until smooth. Let cool slightly before pouring over the chilled cake.
  8. Refrigerate the assembled cake for at least 2 hours before serving. Garnish with chocolate curls or cocoa powder if desired.

Notes

  • Use high-quality chocolate for the mousse and ganache for the best flavor.
  • For an extra-decadent version, brush cake layers with coffee syrup before assembling.
  • This cake can be made a day ahead — the flavors intensify as it chills.
  • Prep Time: 30 minutes
  • Cook Time: 30 minutes
  • Category: Dessert
  • Method: Baking and Chilling
  • Cuisine: French