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Chocolate Mousse Brownies Easy Family Dessert Recipe

Chocolate Mousse Brownies

These Chocolate Mousse Brownies feature a rich, fudgy brownie base topped with airy chocolate mousse and a glossy ganache. A decadent, layered dessert perfect for chocolate lovers and special occasions.
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Prep Time 40 minutes
Cook Time 25 minutes
Total Time 4 hours 5 minutes
Servings: 9 squares
Course: Dessert
Cuisine: American
Calories: 480
Ingredients Method Notes

Ingredients
  

For the Brownie Base
  • 0.5 cup unsalted butter, melted
  • 1 cup granulated sugar
  • 2 large eggs
  • 1 teaspoon vanilla extract
  • 0.33 cup unsweetened cocoa powder sifted
  • 0.5 cup all-purpose flour
  • 0.25 teaspoon salt
  • 0.25 teaspoon baking powder
For the Chocolate Mousse
  • 1.5 cups heavy whipping cream, chilled
  • 8 oz semisweet chocolate, finely chopped
  • 3 tablespoons milk
  • 2 tablespoons powdered sugar
For the Ganache Topping
  • 4 oz semisweet chocolate, finely chopped
  • 0.5 cup heavy cream

Method
 

  1. Step 1: Make the Brownie Base
    Preheat oven to 350°F (175°C) and line an 8×8-inch pan with parchment paper. Whisk together melted butter, sugar, eggs, and vanilla until smooth. Sift in cocoa powder, flour, salt, and baking powder. Fold gently until just combined. Spread batter in pan and bake 20–25 minutes, until a toothpick inserted in the center comes out with moist crumbs. Cool completely.
  2. Step 2: Prepare the Chocolate Mousse
    Heat milk until steaming and pour over chopped chocolate. Let sit for 2 minutes, then stir until smooth. Cool to room temperature. Whip chilled cream with powdered sugar until soft peaks form. Gently fold in cooled chocolate until fully combined. Spread over the cooled brownie base and refrigerate for at least 2 hours.
  3. Step 3: Top with Ganache
    Heat heavy cream until simmering and pour over chopped chocolate. Let sit 2–3 minutes, then stir until smooth. Pour over mousse layer and spread evenly. Refrigerate for 1 hour or until ganache is set.

Notes

For extra texture, top with chocolate curls or a sprinkle of sea salt. This dessert is best served chilled and can be made a day ahead. Store in the refrigerator for up to 4 days.