Layers of white chocolate mousse, dark chocolate mousse, and chocolate cake come together in this Triple Chocolate Mousse dessert for a rich make-ahead treat.
I made this Triple Chocolate Mousse a while ago and still come back to it whenever I want a rich chocolate dessert in smaller portions. Layers of white chocolate mousse, dark chocolate mousse, and chocolate cake give the dessert plenty of texture and deep chocolate flavour. Besides, who can say no to chocolate?
This dessert is made with two different mousses, a white chocolate mousse and a dark chocolate mousse, layered over a chocolate cake base. You can use any chocolate cake you like, including store-bought sponge cake, but I used my eggless yoghurt cake.
I also added Grand Marnier for a light orange flavour. After chilling, the mousse turns smooth, creamy, and rich in chocolate flavour. Enjoy, and let me know what you think in the comments!
Reasons to Make Triple Chocolate Mousse Cake
- Make-ahead desserts like this help free up time before serving dinner or hosting guests.
- Layered desserts like this travel better than large mousse cakes because each portion stays contained in its cup.
- Chilled mousse and soft chocolate cake together give the dessert a smoother texture with a bit more contrast in each spoonful.
Key Ingredients for Triple Chocolate Mousse
White Chocolate
White chocolate gives the mousse sweetness and a creamy flavour. Choose white chocolate made with cocoa butter because it melts more smoothly and gives the mousse a softer texture.
Dark Chocolate
Dark chocolate balances the sweeter white chocolate layer with deeper cocoa flavour. Chocolate around 60–70% cocoa works well because it keeps the mousse rich without becoming too bitter.
Thickened Cream or Heavy Cream
Cream gives the mousse a lighter texture and helps create volume once whipped. Thickened cream and heavy cream both hold air well and produce a stable mousse.
Chocolate Cake
Adds extra texture and breaks up the mousse layers in each serving cup. Slightly firm cake or sponge works best because it stays intact once layered with the mousse.
Find the complete list with measurements in the recipe card below.
How to Make Triple Chocolate Mousse
White Chocolate Mousse
Step 1: Melt the white chocolate and butter together in a small saucepan over low heat. Cool for 5 minutes, then whisk in the egg.
Step 2: Sprinkle the gelatine over 1 tablespoon of water in a small bowl. Place the bowl over boiled water and stir until the gelatine dissolves. Cool slightly, then stir into the chocolate mixture.
Step 3: Beat the cream until fluffy, then fold it gently into the white chocolate mixture.
Dark Chocolate Mousse
Step 1: Melt the dark chocolate and butter together in a small saucepan over low heat. Cool for 5 minutes, then whisk in the egg.
Step 2: Sprinkle the gelatine over 1 tablespoon of water in a small bowl. Place the bowl over boiled water and stir until the gelatine dissolves. Cool slightly, then stir into the melted chocolate mixture.
Step 3: Beat the cream until fluffy, then fold it into the chocolate mixture.
Assemble the Dessert
Step 1: Cut the chocolate cake to fit the base of the serving cups, then place a piece into each cup.
Step 2: Drizzle with Grand Marnier. Spoon over the white chocolate mousse, then top with the dark chocolate mousse.
Step 3: Dust with cocoa powder and decorate with chocolate stars or any other decoration you like. Refrigerate for a couple of hours, then bring back to room temperature before serving.
Frequently Asked Questions
Yes, chocolate sponge cake, mud cake, or even store-bought cake slices all work well for the base. Slightly firm cake holds its shape better once layered with the mousse.
White chocolate chips and dark chocolate chips can both work, although block chocolate usually melts more smoothly. Some chocolate chips contain stabilisers used for baking, which can leave slight white streaks or a grainier texture once melted.
Make sure the gelatine mixture dissolves fully before adding it to the chocolate mixture, and give the mousse enough chilling time before serving. Letting the melted chocolate cool slightly before mixing also helps keep the texture smooth and stable.
Yes, the dessert still works well without it. Grand Marnier adds a light orange flavour to the cake layer, but the mousse remains rich and creamy without the liqueur.
No, a hand mixer works well for whipping the cream and mixing the mousse. A stand mixer with a whisk attachment can make the process easier if you’re preparing multiple dessert cups or larger batches.
Extra Help from the Kitchen
Use a Serrated Knife for the Cake – Cut the chocolate cake with a serrated knife to keep the edges neat and prevent the cake from crumbling inside the cups.
Scrape the Bowl While Folding – Run a rubber spatula or offset spatula along the side of the bowl while folding because the chocolate mixture can settle underneath the cream.
Trim the Cake with a Thin Knife – Use a thin knife to cut neat cake pieces that fit cleanly into the serving cups.
Spoon the Mousse Slowly into the Cups – Fill the serving cups gradually to keep the mousse layers neat and prevent the cake base from shifting.
Smooth Out Large Air Bubbles – Tap the serving cups lightly on the counter before chilling to help release large air bubbles from the mousse layers.
Check the Centre of the Cake – Let the centre of the cake cool completely before cutting because warm cake can soften the mousse layers and make the dessert less stable.
Variations and Twists
Finish with Chocolate Ganache – Spoon a thin layer of chocolate ganache over the mousse before chilling, then finish with chocolate curls for an even richer chocolate finish and a smoother top layer.
Boost with Espresso Powder – Blend a small spoonful of espresso powder into the dark chocolate mixture before folding in the cream.
Swap Grand Marnier for Coffee Liqueur – Drizzle coffee liqueur over the cake base for a mocha-style flavour with the chocolate layers.
Serve with Fresh Berries – Top each cup with raspberries or strawberries before serving for a fresh contrast to the creamy mousse.
Storage and Shelf Life
Store the Triple Chocolate Mousse covered in the refrigerator for up to 3 days. Keep the mousse in airtight containers or covered serving cups to prevent it from absorbing fridge odours.
For longer storage, freeze the mousse for up to 1 month. Thaw overnight in the fridge before serving.
Serve chilled or let the mousse sit at room temperature for 10–15 minutes before serving for a softer texture. Avoid leaving the mousse at room temperature for extended periods because the gelatine softens as it warms.
More Chocolate Mousse Recipes to Try
- Chocolate Mousse with Orange Liqueur
- Chocolate Avocado Mousse
- Espresso and Frangelico Mousse
- Chocolate, Espresso and Chilli Mousse
Triple Chocolate Mousse Recipe
Equipment
Ingredients
White Chocolate Mousse
- 125 g – 4 ½ oz white chocolate
- 60 g – ¼ cup butter unsalted
- 1 egg lightly whisked
- 1 ½ tsp gelatine powder
- 150 ml – ⅔ cup thickened cream or heavy cream
Dark Chocolate Mousse
- 125 g – 4 ½ oz dark chocolate
- 60 g – ¼ cup butter – unsalted
- 1 egg – lightly whisked
- 1 ½ tsp gelatine powder
- 150 ml – ⅔ cup thickened cream or heavy cream
To Assemble
- eggless yoghurt cake or your favourite chocolate cake recipe
- Grand Marnier – optional
- chocolate decorations – optional
- cocoa powder
Instructions
White Chocolate Mousse
- Melt the white chocolate and butter together in a small saucepan over low heat. Cool for 5 minutes, then whisk in the egg.
- Sprinkle the gelatine over 1 tablespoon of water in a small bowl. Place the bowl over boiled water and stir until the gelatine dissolves. Cool slightly, then stir into the chocolate mixture.
- Beat the cream until fluffy, then fold it gently into the white chocolate mixture.
Dark Chocolate Mousse
- Melt the dark chocolate and butter together in a small saucepan over low heat. Cool for 5 minutes, then whisk in the egg.
- Sprinkle the gelatine over 1 tablespoon of water in a small bowl. Place the bowl over boiled water and stir until the gelatine dissolves. Cool slightly, then stir into the melted chocolate mixture.
- Beat the cream until fluffy, then fold it into the chocolate mixture.
Assemble the Dessert
- Cut the chocolate cake to fit the base of the serving cups, then place a piece into each cup.
- Drizzle with Grand Marnier. Spoon over the white chocolate mousse, then top with the dark chocolate mousse.
- Dust with cocoa powder and decorate with chocolate stars or any other decoration you like. Refrigerate for a couple of hours, then bring back to room temperature before serving.
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