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Chocolate Brownie Mousse Cake Recipe

5 Stars 4 Stars 3 Stars 2 Stars 1 Star 3.9 from 35 reviews
  • Author: Mary
  • Prep Time: 30 minutes
  • Cook Time: 25 minutes
  • Total Time: 4 hours 55 minutes
  • Yield: 12 servings
  • Category: Dessert
  • Method: Baking
  • Cuisine: American
  • Diet: Vegetarian

Description

Indulge in this luscious Chocolate Brownie Mousse Cake, featuring a rich, fudgy brownie base topped with a light and creamy chocolate mousse. Perfectly layered and chilled to set, this dessert combines deep chocolate flavors with a smooth whipped topping, making it an irresistible treat for chocolate lovers.


Ingredients

Scale

Brownie Base

  • 1/2 cup unsalted butter (melted)
  • 1 cup granulated sugar
  • 2 large eggs
  • 1 teaspoon vanilla extract
  • 1/3 cup unsweetened cocoa powder
  • 1/2 cup all-purpose flour
  • 1/4 teaspoon salt
  • 1/4 teaspoon baking powder

Chocolate Mousse

  • 1 1/2 cups heavy whipping cream (divided)
  • 8 oz semi-sweet chocolate (chopped)
  • 2 tablespoons granulated sugar
  • 1 teaspoon vanilla extract

Topping

  • 1/2 cup heavy cream
  • 2 tablespoons powdered sugar
  • Chocolate shavings or cocoa powder for garnish (optional)


Instructions

  1. Prepare the Brownie Base: Preheat your oven to 350°F (175°C) and line the bottom of a 9-inch springform pan with parchment paper. In a medium bowl, whisk together the melted butter, sugar, eggs, and vanilla extract until smooth and well combined. Add the cocoa powder, flour, salt, and baking powder; stir until just combined without overmixing. Pour the batter evenly into the prepared pan and bake for 20–25 minutes, or until a toothpick inserted in the center comes out with a few moist crumbs. Allow the brownie base to cool completely in the pan.
  2. Make the Chocolate Mousse: Heat 1/2 cup of the heavy cream in a small saucepan over medium heat until it just begins to simmer. Pour the hot cream over the chopped semi-sweet chocolate placed in a heatproof bowl. Let this sit for 2 minutes to melt the chocolate, then stir gently until smooth and glossy. Allow this mixture to cool to room temperature. In a separate bowl, whip the remaining 1 cup of heavy cream with sugar and vanilla extract until soft peaks form. Fold the whipped cream gently into the cooled chocolate mixture until fully incorporated and smooth.
  3. Assemble the Cake: Evenly spread the chocolate mousse over the cooled brownie base in the springform pan. Cover and refrigerate for at least 4 hours, or until the mousse is firm and set.
  4. Prepare the Topping: Whip the 1/2 cup of heavy cream with powdered sugar until soft peaks form. Spread or pipe this whipped cream over the set mousse layer. Garnish with chocolate shavings or a dusting of cocoa powder if desired. Keep the cake chilled until ready to serve.

Notes

  • This cake can be made a day ahead to allow easier slicing and serving.
  • For a richer mousse, substitute dark chocolate instead of semi-sweet chocolate.
  • Adding one tablespoon of espresso powder to the brownie base enhances the chocolate depth and flavor.