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Chocolate Mousse Brownie Recipe
5 from 18 votes

Chocolate Mousse Brownie Recipe

Chocolate Mousse Brownie Recipe features a fudgy brownie base made from butter, sugar, cocoa powder, and flour, topped with a homemade chocolate mousse created from melted semi-sweet chocolate, marshmallows, milk, and whipped heavy cream. These brownies blend rich chocolate layers and creamy mousse for a luscious dessert with a soft, shiny center and airy topping.

Prep Time
25 mins
Cook Time
30 mins
Total Time
55 mins
Servings: 12 servings
Calories: 383 kcal
Course: Dessert
Cuisine: American

Ingredients

Brownies
  • 3/4 cup butter
  • 1 ½ cups granulated sugar
  • 1 tablespoon vanilla extract
  • 2 egg large
  • 3/4 cup all-purpose flour properly measured
  • 1/2 cup cocoa powder unsweetened
  • 1/2 teaspoon salt
Chocolate Mousse
  • 3/4 cup miniature marshmallows
  • 4 ounces semi-sweet baking chocolate chopped
  • 1/4 cup milk
  • 1 cup heavy cream cold

Instructions

Brownies
    Cup of Yum
  1. Preheat oven to 350 F. Grease or use parchment paper to line a 9x9-inch baking pan.
  2. In a large saucepan, melt butter.
  3. Turn heat to low, and stir in sugar. Let cook, stirring constantly, for 2-3 minutes.
  4. Remove from heat, and stir in vanilla.
  5. Let mixture cool for about 5 minutes.
  6. Whisk in eggs until combined.
  7. Add flour, cocoa powder, and salt. Whisk in until just incorporated.
  8. Pour batter into prepared pan, spreading batter as needed.
  9. Bake for 20-30 minutes. The edges should look done, but the center should still look shiny. A toothpick inserted in the center should come out with a few fudgy crumbs.
  10. Cool completely.
  11. To make the mousse, heat marshmallows, chocolate, and milk in a medium saucepan over low heat, stirring constantly until completely smooth.
  12. Cool completely.
Chocolate Mousse
  1. In a separate bowl, beat whipping cream to stiff beats.
  2. Fold in cooled chocolate mixture.
  3. Spread mousse evenly over brownies.
  4. Chill brownies for at least 30 minutes, or until ready to serve.
  5. Cover and chill leftover brownies.

Notes

  • Use salted butter for the brownies; if unsalted, add 3/4 teaspoon salt to the batter.
  • Measure flour carefully by weighing or lightly spooning and leveling to avoid cakey brownies.
  • Unsweetened cocoa powder brands vary in chocolate depth; choose according to preference.
  • Any milk from skim to whole can be used in the mousse.
  • Beat heavy cream to stiff peaks for proper mousse texture.
  • Nutrition values are estimates based on ingredients used.

Nutrition Information

Serving 1serving Calories 383kcal (19%) Carbohydrates 41g (14%) Protein 3g (6%) Fat 23g (35%) Saturated Fat 14g (70%) Cholesterol 85mg (28%) Sodium 222mg (9%) Potassium 152mg (3%) Fiber 2g (8%) Sugar 30g (60%) Vitamin A 700IU (14%) Vitamin C 0.1mg (0%) Calcium 38mg (4%) Iron 1.6mg (9%)

Nutrition Facts

Serving: 12 servings

Amount Per Serving

Calories 383

% Daily Value*

Serving 1serving
Calories 383kcal 19%
Carbohydrates 41g 14%
Protein 3g 6%
Fat 23g 35%
Saturated Fat 14g 70%
Cholesterol 85mg 28%
Sodium 222mg 9%
Potassium 152mg 3%
Fiber 2g 8%
Sugar 30g 60%
Vitamin A 700IU 14%
Vitamin C 0.1mg 0%
Calcium 38mg 4%
Iron 1.6mg 9%

* Percent Daily Values are based on a 2,000 calorie diet.