🍫 Chocolate Mousse Brownies – Fudgy, Creamy, and Irresistible!
If you love rich chocolate desserts layered with mousse, ganache, and whipped cream, these Chocolate Mousse Brownies will blow you away. They’re indulgent, easy to make, and perfect for celebrations or cozy nights in.
What Kind of Chocolate Should I Use?
For deep, luxurious flavor, dark chocolate (60–70% cocoa) is ideal—it balances the sweetness of the mousse and brownie base. Prefer something milder? Semi-sweet or milk chocolate works well for a sweeter, creamier bite. Whatever you choose, use high-quality chocolate bars or chips for the smoothest results.

Here’s what you’ll need to create this dreamy, layered dessert:
For the Brownie Base:
- 1/2 cup unsalted butter
- 1 cup granulated sugar
- 2 large eggs
- 1 tsp vanilla extract
- 1/3 cup unsweetened cocoa powder
- 1/2 cup all-purpose flour
- 1/4 tsp salt
For the Chocolate Mousse:
- 1 cup semi-sweet or dark chocolate chips
- 1 1/4 cups heavy cream (divided)
- 1 tbsp powdered sugar
For the Whipped Cream Layer:
- 3/4 cup heavy cream
- 1 tbsp powdered sugar
- 1/2 tsp vanilla extract
For the Ganache Topping:
- 1/2 cup chocolate chips
- 1/4 cup heavy cream
Optional Garnish:
- Chocolate curls, cocoa powder, raspberries, or chopped nuts
How To Make Chocolate Mousse Brownies Step by Step

Step 1: Bake the Brownie Base
Preheat your oven to 350°F (175°C). Line an 8×8-inch pan with parchment paper. In a bowl, melt the butter, then whisk in the sugar, eggs, and vanilla. Sift in the cocoa powder, flour, and salt. Stir until smooth. Pour the batter into the pan and bake for 20–25 minutes. Let cool completely.
Step 2: Prepare the Chocolate Mousse
Heat 1/2 cup of heavy cream until just simmering. Pour it over the chocolate chips in a bowl and let sit for 1 minute. Stir until smooth. Let cool to room temperature. Whip the remaining 3/4 cup of heavy cream with powdered sugar until soft peaks form, then gently fold it into the cooled chocolate mixture. Chill while the brownie base cools.
Step 3: Add the Whipped Cream Layer
Whip the cream, powdered sugar, and vanilla extract until soft peaks form. Spread evenly over the mousse layer.
Step 4: Pour the Ganache Topping
Heat the cream and pour it over the chocolate chips in a small bowl. Stir until silky smooth. Let cool slightly, then pour over the whipped cream layer. Smooth the top with a spatula.
Step 5: Garnish, Slice, and Serve
Chill the entire pan for at least 2 hours. When ready to serve, top with chocolate curls or your favorite garnish. Slice into squares and enjoy!
How to Serve and Store Chocolate Mousse Brownies
- To Serve: These brownies are best served chilled for clean cuts and ideal texture.
- To Store: Refrigerate in an airtight container for up to 4 days.
- Tip: For neat slices, dip your knife in hot water and wipe it clean between each cut.

FAQ: Your Chocolate Mousse Brownie Questions Answered
Can I use milk chocolate instead of dark?
Yes, but the brownies will be noticeably sweeter and less rich. You may want to slightly reduce the added sugar.
How can I make these gluten-free?
Replace the all-purpose flour with a 1:1 gluten-free baking flour blend. Be sure to check the labels on other ingredients to ensure they’re gluten-free.
Can I skip the whipped cream layer?
Absolutely! It’s optional, but it adds a beautiful lightness between the mousse and ganache.
How do I prevent the brownie layer from becoming too hard when chilled?
Avoid overbaking and make sure the brownies are slightly underdone in the center. Before serving, let them sit at room temperature for 10–15 minutes to soften.
Is this safe to leave out at room temperature?
Only for short periods. Since the mousse and whipped cream contain dairy, refrigerate after two hours.
Love Desserts with Layers? Try These Next!
If you loved this treat, here are more creamy or layered comfort recipes that deliver on flavor and presentation:

- German Chocolate Poke Cake
- The Coziest Chicken Noodle Soup
- Sweet and Spicy Baked Cauliflower
- Creamy Parmesan Chicken and Orzo
- One Pot Marry Me Shrimp and Orzo Pasta
- Best Smothered Chicken and Rice
- Creamy Broccoli Salad
- Bang Bang Chicken Sliders
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