Classic French Chocolate Mousse

This is the real French mousse au chocolat: dark chocolate lifted by whipped egg whites into something impossibly light yet intensely rich. No gelatine, no shortcuts, just good chocolate and careful folding. Make it a few hours ahead and let the fridge do the setting.

A great chocolate mousse lives or dies on two things: good chocolate and a gentle hand. Get both right and you end up with a spoonful that’s dense with flavour but light as air. This is the classic French method, built on melted dark chocolate, egg yolks and whipped whites, with a little cream for a softer, silkier set. Nothing fussy, but worth doing properly.

Ingredients

• 200g dark chocolate (70% cocoa solids) — chopped; a good bar makes all the difference
• 4 large eggs — separated; use pasteurised if serving anyone vulnerable
• 50g caster sugar
• 150ml double cream
• 30g unsalted butter — cubed
• 1 tbsp brandy or strong espresso — optional, deepens the flavour
• 1 pinch fine sea salt

Method

1. Melt the chopped chocolate and butter together in a heatproof bowl set over a pan of barely simmering water, making sure the bowl doesn't touch the water. Stir until smooth and glossy, then lift off the heat and leave to cool for a few minutes until just warm.
2. Beat the egg yolks with the salt and, if using, the brandy or espresso. Stir this into the warm (not hot) chocolate a little at a time so the yolks don't scramble. You should have a thick, shiny paste.
3. In a clean, grease-free bowl, whisk the egg whites to soft peaks. Add the caster sugar a spoonful at a time, whisking to firm, glossy peaks that hold their shape but aren't dry.
4. Whip the double cream separately to soft, floppy peaks. Fold it gently into the chocolate mixture until just combined.
5. Stir a generous spoonful of the whipped whites into the chocolate to loosen it. This first addition doesn't need to be gentle.
6. Tip in the rest of the whites and fold with a large metal spoon or spatula, cutting down through the middle and lifting over, turning the bowl as you go. Stop the moment no white streaks remain; overworking knocks out the air.
7. Spoon or pipe into four glasses or ramekins. Cover and chill for at least 3 hours, ideally overnight, so the mousse sets to a soft, spoonable firmness.

Serve it with

• a light dusting of cocoa powder
• fresh raspberries
• a curl of dark chocolate shavings
• crisp langue de chat biscuits
• lightly whipped cream

Why this works

Melted chocolate sets firm as it cools, so the whipped egg whites and cream trap air that keeps the mousse light rather than dense. Folding, not stirring, protects those air pockets for the classic mousse texture.

Common swaps

• Use milk chocolate for a sweeter, softer mousse, but drop the sugar to 30g
• Swap brandy for Grand Marnier or a little orange zest for a chocolate-orange version
• Replace the double cream with an extra egg white for a lighter, more traditional set
• Add a pinch of chilli or espresso powder to the melted chocolate for extra depth

Common mistakes to avoid

• Pouring hot chocolate onto the yolks, which scrambles them; let it cool to just warm first
• Whisking the whites until dry and grainy, so they won't fold in smoothly
• Overfolding until the mixture goes flat and loses its airy lift
• Not chilling long enough, leaving the mousse loose rather than set

Storage, freezing & reheating

Storage: Keep covered in the fridge for up to 2 days. The texture is best within 24 hours.

Freezing: Freezes surprisingly well for up to 1 month; thaw in the fridge for a few hours, where it takes on an almost semifreddo quality.

Allergen notes: contains Milk, Egg. Always check individual product labels.

Estimated nutrition

Per serving, estimated from typical ingredient values — not a substitute for precise dietary calculation.