Chocolate Mousse
Prep Time 25 minutes 
Total Time 25 minutes 
Servings 4Ingredients
- 200 gr dark chocolate good quality, 70% cocoa
- 4 egg
- 50 gr caster sugar
- 100 gr unsalted butter
- 1 tsp vanilla extract optional
- 1 pinch salt
Equipment
Instructions
1. Melt the chocolate and butter
- Place the dark chocolate and butter in a heatproof bowl over a saucepan of simmering water (bain-marie). Stir gently until fully melted and smooth. Remove from heat and allow to cool slightly.
2. Whisk the egg yolks and sugar
- In a separate bowl, whisk together the egg yolks and caster sugar until the mixture becomes pale and creamy. If using vanilla, add it here. Gently fold this mixture into the melted chocolate and butter, combining thoroughly.
3. Beat the egg whites
- In a clean bowl, add a pinch of salt to the egg whites and whisk them until they form stiff, glossy peaks.
4. Fold the egg whites into the chocolate mixture
- First, add one-third of the beaten egg whites to the chocolate mixture and stir to lighten it. Then, gently fold in the remaining egg whites in two additions, taking care not to deflate the mousse.
5. Chill the mousse
- Spoon the mousse into serving bowls or glasses, cover, and refrigerate for at least 3-4 hours, or until set and delightfully airy.
6. Serve
- Serve chilled, optionally topped with a dusting of cocoa powder or a dollop of lightly whipped cream.
Notes
- For the best results, use the freshest eggs possible.
- The mousse has raw eggs, so avoid if pregnant or if concerned about egg safety.
- Folding in the egg whites gently preserves the airy texture that defines this classic dessert.
About this recipe
Chocolate mousse is one of those French desserts that looks like it requires skill and actually requires almost none. Dark chocolate, eggs, a little sugar, and patience while it sets. The result is something that tastes significantly better than the effort involved, which is the best kind of recipe to have in your repertoire.
What mousse actually means
The word mousse means foam in French, which describes the texture precisely. It’s not a cream, not a pudding, not a ganache. It’s something lighter than all of those, with an airy structure that comes from incorporating whipped egg whites or cream into melted chocolate. The foam holds the chocolate in suspension, giving you richness and lightness in the same mouthful.
Early French mousses were actually savoury. Fish mousses, shellfish mousses, poultry mousses. The technique of aerating a base with whipped ingredients was applied to savoury dishes long before it reached dessert. The sweet chocolate mousse dessert came later, once chocolate had established itself as a cooking ingredient rather than just a drink.
Where chocolate mousse comes from
There is a popular story that the French post-Impressionist painter Henri Toulouse-Lautrec invented chocolate mousse in the late 19th century and called it “mayonnaise de chocolat.” It’s a good story. It’s probably not true.
Recipes resembling easy chocolate mousse appear in French cookbooks as early as the mid-1700s. The dessert grew alongside France’s relationship with chocolate itself, which arrived in Europe via Spain in the 17th century after the royal wedding of Princess Anne of Austria to Louis XIII. French chefs got hold of it and immediately started working out what to do with it. Folding whipped eggs into melted chocolate to create a light, frothy cocoa mousse was an early and obvious application of the technique they already used for savoury mousses.
By the 19th century, chocolate mousse french cookbooks described as a refined dessert suitable for elegant tables. By the 20th century it had moved into home kitchens and become one of the most widely made French desserts in the world.
The technique
A proper chocolate mousse has two non-negotiable requirements: good chocolate and properly whipped egg whites. Everything else is detail.
The chocolate needs to be dark, at least 70% cocoa solids. Milk chocolate doesn’t have enough structure to set the mousse properly, and the flavour is too sweet against the egg. Dark chocolate gives you depth, slight bitterness, and a mousse that actually holds its shape.
The egg whites need to be whipped to stiff peaks and folded in gently rather than mixed. This is where the texture comes from. Fold too aggressively and you knock out the air you just whipped in, and the cocoa mousse turns dense and heavy. Fold carefully, in two or three additions, and the chocolate mixture loosens gradually without losing the foam.
The right equipment for melting chocolate
Chocolate needs gentle, indirect heat to melt properly. Direct heat causes it to seize or burn, which ruins the texture and the flavour of the finished mousse.
A double boiler is the right tool for this. I use the stainless steel double boiler for this easy chocolate mousse recipe. The water in the lower pan heats gently and transfers that heat evenly through the upper pan, keeping the chocolate at a steady, controlled temperature throughout the melting process. It also works for the egg yolk and sugar mixture that forms the base of the mousse, which needs the same careful, indirect heat to cook without scrambling. A good double boiler handles both jobs and lasts for years.
Setting and serving
The chocolate mousse dessert needs at least two hours in the fridge to set properly, and ideally overnight. The texture improves significantly with time as the chocolate firms up and the foam stabilises. Make it the day before if you can.
Serve in individual glasses or bowls, which is the French way. A single shared dish works too, but individual portions look more considered and make it easier to serve neatly at the table. No elaborate garnish needed. A small spoonful of crème fraîche or a few chocolate shavings is enough. The mousse itself is the point.
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If you try this recipe, I’d love to hear how it turns out! Leave a ★★★★★ rating and your thoughts in the comments, it helps fellow French foodies discover this recipe too. Snap a photo and tag me @obviously.french on Instagram if you’re sharing your bake or cooking online. Don’t forget to save this recipe to Pinterest so you’ll always have it handy for your next French-inspired meal!
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