These Chocolate Mousse Brownies combine a rich, fudgy brownie base with a light and airy chocolate mousse topping, creating a decadent dessert that’s perfect for any chocolate lover.

Why You’ll Love This Recipe

I love how this recipe brings together two classic desserts into one indulgent treat. The dense brownie layer provides a satisfying chew, while the creamy mousse adds a delightful contrast in texture. It’s a show-stopping dessert that’s surprisingly easy to make and always impresses guests.

Ingredients

(Here’s a tip: Check out the full list of ingredients and measurements in the recipe card below.)

For the Brownie Layer:

1/2 cup (115g) unsalted butter, melted
1 cup (200g) granulated sugar
2 large eggs
1 tsp vanilla extract
1/2 cup (65g) all-purpose flour
1/3 cup (35g) unsweetened cocoa powder
1/4 tsp baking powder
1/4 tsp salt

For the Chocolate Mousse:

12 oz (340g) semi-sweet chocolate, chopped
1/2 cup (120ml) heavy cream
1 1/2 cups (360ml) heavy whipping cream
2 tbsp powdered sugar
1 tsp vanilla extract

Directions

Prepare the Brownie Layer:
- Preheat the oven to 350°F (175°C). Line an 8×8-inch baking pan with parchment paper.
- In a mixing bowl, combine melted butter and granulated sugar. Add eggs and vanilla extract, mixing until smooth.
- In a separate bowl, whisk together flour, cocoa powder, baking powder, and salt.
- Gradually add the dry ingredients to the wet ingredients, mixing until just combined.
- Pour the batter into the prepared pan and spread evenly.
- Bake for 20-25 minutes, or until a toothpick inserted into the center comes out with a few moist crumbs.
- Allow the brownies to cool completely in the pan.
Prepare the Chocolate Mousse:
- In a heatproof bowl, melt the chopped semi-sweet chocolate with 1/2 cup of heavy cream over a saucepan of simmering water, stirring until smooth. Let it cool to room temperature.
- In a separate bowl, whip the heavy whipping cream with powdered sugar and vanilla extract until stiff peaks form.
- Gently fold the cooled chocolate mixture into the whipped cream until fully incorporated.
Assemble:
- Spread the chocolate mousse evenly over the cooled brownie layer.
- Refrigerate for at least 2 hours, or until the mousse is set.
Serve:
- Once set, remove the brownies from the pan using the parchment paper overhang.
- Cut into squares and serve chilled.

Servings and Timing

Servings: 12 brownies
Prep Time: 30 minutes
Cook Time: 25 minutes
Chill Time: 2 hours
Total Time: Approximately 3 hours

Variations

Mint Chocolate Mousse Brownies: Add 1/2 tsp of peppermint extract to the mousse for a refreshing twist.
Nutty Brownies: Fold 1/2 cup of chopped nuts into the brownie batter before baking.
Berry Topped Brownies: Top the mousse layer with fresh raspberries or strawberries before chilling.

Storage/Reheating

Refrigerator: Store in an airtight container for up to 5 days.
Freezer: Freeze individual squares wrapped in plastic wrap and placed in a freezer-safe container for up to 2 months. Thaw in the refrigerator before serving.
Reheating: These brownies are best served chilled. If desired, bring to room temperature before serving; avoid microwaving to maintain the mousse texture.

FAQs

What type of chocolate works best for the mousse?

I prefer using high-quality semi-sweet chocolate for a balanced flavor, but you can use dark chocolate for a richer taste or milk chocolate for a sweeter profile.

Can I make these brownies ahead of time?

Absolutely! I often make them a day in advance and let them chill overnight, which enhances the flavors and ensures the mousse sets perfectly.

Is it possible to use a boxed brownie mix?

Yes, if I’m short on time, I use a boxed brownie mix for the base and prepare the mousse as described. Just ensure the brownies are fully cooled before adding the mousse.

How do I achieve clean cuts when slicing the brownies?

I recommend using a sharp knife dipped in hot water and wiped dry before each cut. This method helps in achieving neat slices without smearing the mousse.

Can I add toppings to the mousse layer?

Certainly! I like to garnish with chocolate shavings, a dusting of cocoa powder, or fresh berries for added visual appeal and flavor.

Conclusion

These Chocolate Mousse Brownies are a delightful fusion of rich, fudgy brownies and light, airy chocolate mousse. Whether for a special occasion or a treat-yourself moment, they never fail to impress. I hope you enjoy making and indulging in them as much as I do!