cook · dessert · french

How to Make Chocolate Mousse

This is the mousse that made French pastry chefs famous—just chocolate, eggs, and technique. No cream, no gelatin, no shortcuts. When you fold melted chocolate into billowy egg whites, something magical happens: the mixture transforms into silk that firms up in the refrigerator.

Before you start

Temperature is everything—hot chocolate kills egg whites

The chocolate must cool to barely warm before you fold it in, or the egg whites will deflate instantly. Have your serving cups ready because mousse waits for no one once it's mixed.

Ingredients

The fold

How to fold without deflating

Add one-third of the whites to the chocolate first—this lightens the mixture so the remaining whites fold in easily. Use a rubber spatula to cut down through the center, sweep across the bottom, and lift up the side in one fluid motion.

Step by step

  1. Melt the chocolate in a double boiler over barely simmering water. Stir occasionally until smooth, then remove from heat and let cool for 10 minutes. The chocolate should feel just warm to the touch, not hot.
  2. Whisk egg yolks with 1 tablespoon sugar until pale. Beat for 2-3 minutes until the mixture lightens in color and thickens slightly. Stir in the brandy if using.
  3. Fold the cooled chocolate into the egg yolk mixture. Add the chocolate gradually, whisking constantly, until completely combined and glossy.
  4. Whip egg whites with salt until foamy, then add remaining sugar. Beat until the whites hold soft peaks that droop slightly when you lift the beaters. Don't overbeat—stiff peaks will make the mousse dense.
  5. Fold one-third of the whites into the chocolate mixture. This first addition lightens the chocolate base and makes the final folding easier. Mix thoroughly—you want no streaks.
  6. Gently fold in the remaining whites in two additions. Use long, sweeping motions and stop as soon as you see no white streaks. A few small lumps are better than deflated whites.
  7. Divide among serving cups and refrigerate for at least 4 hours. The mousse will be soft at first but firms up as it chills. Cover with plastic wrap if storing overnight.

Tips & troubleshooting

Variations

Questions

Why did my mousse turn grainy?
The chocolate was too hot when you folded it in, cooking the egg whites. Let the chocolate cool completely next time—it should barely feel warm.
Can I make this without eggs?
Traditional mousse relies on egg whites for its airy texture. Without them, you'd need to make a different dessert entirely, like chocolate pots de crème.
How do I know when the egg whites are ready?
Lift the beaters—the peaks should droop over like a bird's beak. If they stand straight up, you've gone too far.

Further reading