Triple Chocolate Mousse Cake Recipe
If you’re searching for the ultimate showstopper dessert, look no further than Triple Chocolate Mousse Cake. This beauty layers a fudgy brownie base with three silky mousses—dark, milk, and white chocolate—creating a decadent treat that’s as stunning as it is delicious. Each bite is a symphony of rich chocolate flavor and creamy texture, making this cake a true celebration for chocolate lovers and a guaranteed crowd-pleaser at any gathering.

Ingredients You’ll Need
Don’t be intimidated by the layers—each ingredient here plays a vital role, and together, they make magic. Quality chocolate and fresh cream are the stars, while a few pantry staples help build the perfect base for this dreamy Triple Chocolate Mousse Cake.
- Unsalted butter (1/2 cup): Gives the brownie base its rich, melt-in-your-mouth texture.
- Semi-sweet chocolate, chopped (4 oz): Delivers deep cocoa notes to anchor the brownie layer.
- Granulated sugar (1/2 cup): Sweetens and balances the intensity of the chocolate.
- Large eggs (2): Bind the brownie together and add richness.
- Vanilla extract (1 tsp): Enhances all the chocolate flavors with a fragrant warmth.
- All-purpose flour (1/3 cup): Provides structure to the brownie base without making it heavy.
- Salt (1/4 tsp): A pinch brings out the best in your chocolate, never skip it!
- Dark chocolate, chopped (4 oz): Creates the intense and sophisticated first mousse layer.
- Heavy cream, divided (3 cups total): The secret to the pillowy mousse texture in every layer.
- Gelatin (3 tsp): Ensures each mousse layer sets perfectly and slices cleanly.
- Water (3 tbsp): Blooms the gelatin for the mousse layers—don’t skip this tiny step!
- Milk chocolate, chopped (4 oz): Adds a creamy, comforting note to the middle mousse.
- White chocolate, chopped (4 oz): Gives the top mousse a sweet, milky finish and beautiful color contrast.
- Optional toppings: chocolate shavings, cocoa powder, or fresh berries: A finishing flourish that makes your Triple Chocolate Mousse Cake truly irresistible.
How to Make Triple Chocolate Mousse Cake
Step 1: Prepare the Brownie Base
Start by preheating your oven to 350°F (175°C) and lining a 9-inch springform pan with parchment paper. Gently melt butter and semi-sweet chocolate together in a saucepan, stirring until smooth and glossy. Off the heat, whisk in sugar, eggs, and vanilla, then fold in flour and salt just until combined. Pour this luscious batter into your pan and bake for 20 to 22 minutes—you’re aiming for a moist, slightly fudgy base. Let it cool completely before you move on.
Step 2: Make the Dark Chocolate Mousse
Sprinkle gelatin over water in a small bowl and let it bloom for 5 minutes. Meanwhile, gently heat 1/4 cup of cream until just warm (not boiling), then stir in the bloomed gelatin until dissolved. Pour this mixture over your chopped dark chocolate and stir until everything is perfectly smooth and melted. Let it cool for a few minutes. Whip the rest of the cream (3/4 cup) to soft peaks, then gently fold it into the chocolate mixture. Spread this over the cooled brownie base and refrigerate for 30 minutes to set.
Step 3: Make the Milk Chocolate Mousse
Repeat the magic for the next layer: bloom the gelatin in water, warm 1/4 cup cream, dissolve the gelatin, and pour over the chopped milk chocolate. Once smooth and slightly cooled, fold in softly whipped cream. Spread this dreamy milk chocolate mousse over the chilled dark chocolate layer, and pop the cake back in the fridge for another 30 minutes.
Step 4: Make the White Chocolate Mousse
One last layer! Follow the same process as before: bloom gelatin, mix with warm cream, pour over white chocolate, and stir until smooth. Allow to cool slightly, then gently fold in whipped cream. Carefully spread the white chocolate mousse over the milk chocolate layer, smoothing the top. Refrigerate the entire cake for at least 4 hours—or overnight—so every layer sets beautifully.
Step 5: Unmold and Garnish
Once fully set, run a thin knife around the edge of the pan and remove the springform ring. Transfer your Triple Chocolate Mousse Cake to a serving plate and finish with a flourish of chocolate shavings, a dusting of cocoa powder, or a handful of fresh berries. Slice and enjoy your masterpiece!
How to Serve Triple Chocolate Mousse Cake

Garnishes
Garnishing your Triple Chocolate Mousse Cake is almost as fun as making it! A generous tumble of chocolate curls or shavings instantly adds elegance, while a light dusting of cocoa powder brings a touch of drama. Fresh berries not only provide a pop of color but also a bright, juicy contrast to all that chocolate richness.
Side Dishes
This cake shines on its own, but serving it with a dollop of lightly sweetened whipped cream or a scoop of vanilla gelato makes each slice even more indulgent. If you want to balance out the chocolate, offer a small bowl of tart raspberries or a simple citrus salad on the side.
Creative Ways to Present
For an extra-special presentation, serve individual slices on plates drizzled with raspberry coulis or caramel sauce. You can even cut the Triple Chocolate Mousse Cake into small squares for a chic dessert buffet. Edible gold leaf or a sprig of fresh mint on each slice adds a sophisticated touch for celebrations.
Make Ahead and Storage
Storing Leftovers
Once you’ve enjoyed your first (or second!) slice, cover the cake tightly with plastic wrap or transfer leftovers to an airtight container. The Triple Chocolate Mousse Cake will keep beautifully in the fridge for up to 4 days, maintaining those lovely layers and creamy texture.
Freezing
If you want to plan ahead or save a few slices for a future treat, this cake freezes surprisingly well. Chill the cake until firm, wrap individual slices or the whole cake tightly in plastic wrap and foil, then freeze for up to one month. Thaw overnight in the refrigerator before serving for best results.
Reheating
Triple Chocolate Mousse Cake is best served chilled, so there’s no need to reheat. If your cake has been in the freezer, simply let it thaw gently in the fridge until the mousse is creamy and luscious once more.
FAQs
Can I make this cake without gelatin?
Yes, you can use agar-agar as a vegetarian alternative to gelatin, but keep in mind that the texture may be slightly firmer and not quite as creamy. Be sure to follow the package instructions for substituting agar-agar for gelatin.
Can I use store-bought brownie mix for the base?
Absolutely! If you’re short on time, a good-quality brownie mix will work just fine for the base. Just be sure to bake it in a 9-inch springform pan and let it cool completely before adding your mousse layers.
What type Dessert
For the richest flavor, use high-quality chocolate bars rather than chocolate chips, as bars tend to melt more smoothly and deliver a deeper chocolate taste. The better the chocolate, the more luxurious your Triple Chocolate Mousse Cake will be!
Can I make this cake ahead for a party?
This is truly the perfect make-ahead dessert! The cake needs several hours to set, so it’s ideal to prepare it the night before your event. Simply keep it chilled until you’re ready to serve for stress-free entertaining.
How do I get perfectly clean layers when slicing?
For those picture-perfect slices, dip a sharp knife in hot water and wipe it dry between each cut. This helps the blade glide through each mousse layer smoothly and keeps your Triple Chocolate Mousse Cake looking flawless.
Final Thoughts
If you love chocolate in all its glorious forms, you owe it to yourself to try this Triple Chocolate Mousse Cake. It’s a labor of love that rewards you with every rich, creamy bite—perfect for birthdays, holidays, or any occasion that deserves a little extra indulgence. Gather your ingredients, invite some friends, and let the chocolate celebration begin!
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Triple Chocolate Mousse Cake Recipe
- Total Time: 5 hours
- Yield: 12 servings 1x
- Diet: Non-Vegetarian
Description
This elegant Triple Chocolate Mousse Cake features a rich brownie base topped with luscious layers of dark, milk, and white chocolate mousse. Perfect for chocolate lovers, each mousse layer is creamy and light, creating a decadent yet airy dessert that’s ideal for special occasions or a luxurious treat.
Ingredients
Brownie Base
- 1/2 cup unsalted butter
- 4 oz semi-sweet chocolate, chopped
- 1/2 cup granulated sugar
- 2 large eggs
- 1 teaspoon vanilla extract
- 1/3 cup all-purpose flour
- 1/4 teaspoon salt
Dark Chocolate Mousse
- 4 oz dark chocolate, chopped
- 1 cup heavy cream (divided into 1/4 cup and 3/4 cup)
- 1 teaspoon gelatin
- 1 tablespoon water
Milk Chocolate Mousse
- 4 oz milk chocolate, chopped
- 1 cup heavy cream (divided into 1/4 cup and 3/4 cup)
- 1 teaspoon gelatin
- 1 tablespoon water
White Chocolate Mousse
- 4 oz white chocolate, chopped
- 1 cup heavy cream (divided into 1/4 cup and 3/4 cup)
- 1 teaspoon gelatin
- 1 tablespoon water
Optional Toppings
- Chocolate shavings
- Cocoa powder
- Fresh berries
Instructions
- Preheat and Prepare Pan: Preheat the oven to 350°F (175°C) and line the bottom of a 9-inch springform pan with parchment paper to prevent sticking and ensure easy removal of the cake.
- Make the Brownie Base: In a saucepan over low heat, melt the butter and semi-sweet chocolate together, stirring until smooth. Remove from heat and whisk in sugar, eggs, and vanilla extract until well combined. Gently fold in the flour and salt until just mixed. Pour the batter into the prepared pan and bake for 20–22 minutes, until a toothpick inserted comes out mostly clean. Allow to cool completely in the pan.
- Prepare Dark Chocolate Mousse: Sprinkle gelatin over 1 tablespoon water and let it bloom for 5 minutes. Heat 1/4 cup of heavy cream until warm but not boiling. Stir in the gelatin until fully dissolved. Pour this over the chopped dark chocolate and stir until the chocolate melts and the mixture is smooth. Let cool slightly. Whip the remaining 3/4 cup cream to soft peaks and gently fold it into the chocolate mixture. Spread this mousse evenly over the cooled brownie base and refrigerate for 30 minutes to set.
- Prepare Milk Chocolate Mousse: Repeat the gelatin blooming and mixing process with the milk chocolate as with the dark chocolate mousse. Once combined and folded with whipped cream, spread the milk chocolate mousse over the dark chocolate layer. Chill again in the refrigerator for another 30 minutes to firm up.
- Prepare White Chocolate Mousse: Follow the same gelatin blooming and melting method with the white chocolate layer. Fold the whipped cream gently into the white chocolate mixture and spread it evenly on top of the milk chocolate mousse. Smooth the top carefully and refrigerate the entire cake for at least 4 hours or overnight to fully set all the layers.
- Serve: Carefully remove the cake from the springform pan. Garnish with chocolate shavings, a dusting of cocoa powder, or fresh berries if desired. Slice and serve chilled for the best texture and flavor.
Notes
- Use high-quality chocolate for the best taste and texture in your mousse layers.
- Allow each mousse layer to set properly in the refrigerator before adding the next to maintain distinct, clean layers in the cake.
- Make sure not to overheat cream to avoid curdling; warm it just enough to dissolve the gelatin.
- This cake can be made a day ahead and stored covered in the refrigerator for optimal flavor development.
- Prep Time: 1 hour
- Cook Time: 22 minutes
- Category: Dessert
- Method: No-Bake (mousse), Baking (base)
- Cuisine: European
Nutrition
- Serving Size: 1 slice
- Calories: 430
- Sugar: 28g
- Sodium: 90mg
- Fat: 31g
- Saturated Fat: 19g
- Unsaturated Fat: 10g
- Trans Fat: 0g
- Carbohydrates: 35g
- Fiber: 2g
- Protein: 5g
- Cholesterol: 110mg