Two-Ingredient Dark Chocolate Mousse (Yes, Really)

This one sounds like a trick, and the first time you make it you will not believe it worked. Dark chocolate mousse from two ingredients — chocolate and water — no eggs, no cream, no dairy. It comes from the French chemist Hervé This, and it works because cocoa butter and water can be whipped into a foam the same way cream can, as long as the chocolate is good.

That last part is the catch: with only two ingredients, the chocolate is the entire flavor. A clean single-origin dark bar makes a mousse that tastes of dark fruit and roasted cacao. A cheap bar makes a sad one.

Ingredients (serves 4 small portions)

• 8 oz (225g) single-origin dark chocolate (70% works beautifully), chopped
• 3/4 cup (180ml) water — plain, or brewed coffee for depth
• Optional finish: flaky sea salt, or a few cacao nibs for crunch

Method

1. Set a large bowl inside a second, bigger bowl filled with ice and a little water. You will whip the mousse over the ice.
2. Gently melt the chocolate with the water in a saucepan over low heat, stirring until completely smooth.
3. Pour the melted mixture into the chilled bowl set over the ice.
4. Whisk steadily. In 2–4 minutes the mixture will cool and thicken into a mousse. Watch closely — stop the instant it holds soft peaks.
5. Spoon into glasses, finish with sea salt or cacao nibs, and serve. If it ever seizes or turns grainy, just re-melt gently and whisk again over ice.

Frequently Asked Questions

How does chocolate mousse work with no cream or eggs?

Cocoa butter behaves like other fats: whip it with water over ice and it sets into an aerated foam, just as cream whips into whipped cream. The water content and the whipping incorporate air, giving you mousse texture from the chocolate alone.

What chocolate percentage is best for two-ingredient mousse?

70% is the sweet spot — enough cocoa butter to set well and enough sugar to taste balanced. Higher percentages like 85% work but make a denser, more bitter mousse. See our guide to cacao percentage to choose.

Is this mousse dairy-free and vegan?

Yes — with a dark chocolate bar that contains only cacao and sugar, this mousse is naturally dairy-free, egg-free, and vegan.

Two ingredients in, two ingredients out. Our 70% Honduran bar is built for this. Taste the land. Know the people. Experience the legacy.