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Chocolate mousse brownies with three rich layers—fudgy brownie base, creamy chocolate mousse center, and glossy chocolate ganache topped with chocolate shavings.

Chocolate Mousse Brownies

These indulgent Chocolate Mousse Brownies feature a dense, chewy fudge brownie base topped with a thick layer of light, airy chocolate mousse and a silky ganache finish. A stunning triple-layer dessert.
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Course: Dessert
Cuisine: American
Prep Time: 30 minutes
Cook Time: 25 minutes
Total Time: 3 hours 55 minutes
Servings: 9 g
Calories: 420kcal
Cost: $12

Equipment

  • 1 Baking pan (8x8 inch)
  • 1 Electric mixer (Hand or stand)
  • 3 Mixing bowls (Medium)
  • 1 Offset spatula (For smooth layers)

Ingredients

  • ½ cup unsalted butter - Melted
  • 1 cup granulated sugar - For brownie
  • 2 large eggs - Room temperature
  • 1 teaspoon vanilla extract - Divided use
  • cup unsweetened cocoa powder - Dutch process
  • ½ cup all-purpose flour - Sifted
  • ¼ teaspoon salt - Balances flavor
  • 1 ½ cups heavy whipping cream - Cold, for mousse
  • 1 cup semi-sweet chocolate chips - Melted and cooled for mousse
  • ¼ cup powdered sugar - For mousse
  • ½ cup chocolate chips - For ganache
  • ¼ cup heavy cream - Hot, for ganache
  • 2 tablespoon chocolate shavings - Garnish

Instructions 

  • Preheat oven to 350°F and line an 8x8 inch pan with parchment paper.
  • Whisk melted butter, sugar, eggs, and vanilla; stir in cocoa, flour, and salt.
  • Bake for 20–25 minutes; let cool completely in the pan.
  • Whip heavy cream and powdered sugar to stiff peaks; fold in cooled melted chocolate.
  • Spread mousse over cooled brownies and refrigerate for 30 minutes.
  • Pour hot cream over chocolate to make ganache; spread over mousse and chill for 3 hours.
  • Top with chocolate shavings, slice with a hot knife, and serve.

Notes

Ensure the brownie base is completely cool before adding the mousse layer to prevent melting. Use a hot knife to slice for clean, bakery-style edges.

Nutrition

Serving: 120g | Calories: 420kcal (21%) | Carbohydrates: 40g (13%) | Protein: 5g (10%) | Fat: 29g (45%) | Saturated Fat: 18g (113%) | Polyunsaturated Fat: 1g | Monounsaturated Fat: 8g | Cholesterol: 105mg (35%) | Sodium: 90mg (4%) | Potassium: 200mg (6%) | Fiber: 3g (13%) | Sugar: 32g (36%) | Vitamin A: 650IU (13%) | Calcium: 45mg (5%) | Iron: 1.5mg (8%)