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Chocolate Mousse Brownies Recipe

Chocolate Mousse Brownies combine fudgy brownie base with silky chocolate mousse topping. Ultra-rich double chocolate decadence perfect for parties, date nights, and Pinterest chocolate dessert boards that guarantee saves and shares.

Ingredients

Scale
  • Brownie Layer:
  • ¾ cup unsalted butter (melted)
  • 1½ cups granulated sugar
  • 2 large eggs (room temp)
  • 1 tsp vanilla extract
  • ½ cup unsweetened cocoa powder
  • ¾ cup all-purpose flour
  • ½ tsp salt
  • ½ tsp baking powder
  • Chocolate Mousse:
  • ¾ cup mini marshmallows
  • 4 oz semi-sweet chocolate (chopped)
  • ¼ cup whole milk
  • 1 cup heavy whipping cream (cold)
  • Optional: chocolate ganache drizzle

Instructions

  • 1. Preheat oven 350°F. Line 8×8″ pan with parchment, spray sides.
  • 2. Whisk melted butter + sugar until smooth. Add eggs one at a time, then vanilla.
  • 3. Sift in cocoa, flour, salt, baking powder. Stir until just combined (few lumps OK).
  • 4. Spread evenly in pan. Bake 25-28 mins until toothpick has moist crumbs. Cool completely.
  • 5. Melt marshmallows, chocolate, milk over low heat, stirring constantly until smooth. Cool 20 mins.
  • 6. Whip heavy cream to stiff peaks. Fold cooled chocolate mixture into whipped cream until uniform.
  • 7. Spread mousse over cooled brownies. Chill 2+ hours to set.
  • 8. Optional: drizzle with ganache. Cut into 16 squares.

Notes

  • Cool brownie base completely prevents mousse melt.
  • Mini marshmallows melt smoothest. Chopped regular work too.
  • Heavy cream MUST be cold for proper whip.
  • Chill time essential for clean cuts. Overnight = best.
  • Freezes beautifully up to 2 months. Thaw fridge.
  • 9×9 pan = thinner layers, same method.
  • Upgrade: sea salt flakes + chopped hazelnuts.
  • Make ahead party star – improves overnight.

Nutrition

Keywords: chocolate mousse brownies, mousse topped brownies, fudgy chocolate brownies, double chocolate dessert, party brownies