Classic Chocolate Mousse Recipe

Overview

This classic chocolate mousse has a deep chocolate flavor, a smooth spoonful, and enough airiness to feel light rather than dense. The recipe uses melted dark chocolate, a gently cooked egg-yolk mixture, whipped cream, and whipped egg whites for a balanced texture.

Plan ahead: the mousse needs at least 4 hours in the refrigerator to set properly. Use good-quality chocolate because its flavor is prominent, and choose pasteurized eggs if you prefer to avoid serving dessert with uncooked egg whites.

Ingredients

• 170 g (6 ounces) dark chocolate, finely chopped; use 60–70% cacao for a balanced flavor
• 3 large eggs, separated, preferably pasteurized
• 50 g (1/4 cup) granulated sugar, divided
• 240 ml (1 cup) cold heavy cream
• 1/4 teaspoon fine salt, divided
• 1/2 teaspoon vanilla extract, optional
• Chocolate shavings or lightly whipped cream, for serving, optional

How to make it

1. Prepare the chocolate and serving dishes. Place the chopped chocolate in a medium heatproof bowl. Set out six small glasses or ramekins. If using a chocolate bar, chop it finely so it melts evenly.

2. Melt the chocolate. Set the bowl over a saucepan containing about 2.5 cm (1 inch) of barely simmering water. The bottom of the bowl should not touch the water. Stir occasionally until the chocolate is smooth and fully melted, then remove the bowl from the heat. Let it cool for 5–10 minutes; it should feel warm but not hot when touched.

3. Gently cook the egg yolks. Put the yolks, 25 g (2 tablespoons) of the sugar, 2 tablespoons of the heavy cream, and 1/8 teaspoon of the salt in a clean heatproof bowl. Whisk until smooth. Set the bowl over the same pan of barely simmering water and whisk constantly for about 3–5 minutes, until the mixture thickens slightly and reaches 71°C (160°F) on an instant-read thermometer. Do not let the bowl touch the water.

4. Combine the yolks and chocolate. Remove the yolk mixture from the heat and whisk in the melted chocolate and vanilla, if using. The mixture should be glossy and thick. If it becomes stiff, whisk in 1 tablespoon of the remaining cream at a time until smooth. Set aside to cool until just slightly warm, about 10 minutes.

5. Whip the cream. Pour the cold heavy cream into a chilled bowl and beat with a hand mixer on medium speed until it forms soft peaks. When the beaters are lifted, the cream should hold a rounded peak that gently bends over. Do not whip it until grainy or stiff.

6. Whip the egg whites. In a separate clean, dry bowl, beat the egg whites with the remaining 1/8 teaspoon salt on medium speed until foamy. Increase to medium-high and gradually add the remaining 25 g (2 tablespoons) sugar. Beat until the whites are glossy and form medium-stiff peaks. The peaks should stand up but still look smooth, not dry or clumpy.

7. Lighten the chocolate mixture. Fold about one-third of the whipped cream into the chocolate mixture with a flexible spatula. Use broad strokes from the bottom of the bowl upward until no obvious streaks remain. This loosens the chocolate so the remaining air is easier to preserve.

8. Fold in the remaining cream and egg whites. Fold in the rest of the whipped cream in two additions. Then fold in the egg whites in two or three additions, rotating the bowl as you work. Stop as soon as the mousse is evenly colored with no large white streaks. A few tiny pale streaks are preferable to deflating the mixture with excessive stirring.

9. Chill. Divide the mousse among the six serving dishes. Cover and refrigerate for at least 4 hours, or overnight. The finished mousse should be cool, softly set, and able to hold a spoon mark while remaining creamy.

10. Serve. Let the mousse stand at room temperature for 5–10 minutes before serving for the smoothest texture. Add chocolate shavings or a small spoonful of softly whipped cream just before serving.

Expert tips

• Keep water out of the chocolate. Even a small amount of steam or water can make melted chocolate thick and grainy. If that happens, whisk in 1 teaspoon of warm heavy cream at a time until smooth.
• Control the temperature. Hot chocolate can melt the whipped cream and egg whites, while cool chocolate can seize into lumps. Combine them when the chocolate mixture is warm but comfortable to touch.
• Fold, do not stir. Scraping around the bowl and lifting from the bottom preserves the air that gives mousse its light texture.
• For a milder mousse, use chocolate around 55–60% cacao. For a darker, more intense mousse, use 70% cacao and add an extra 1 tablespoon of sugar to the egg whites if desired.
• For a cream-only version, replace the egg whites with an additional 120 ml (1/2 cup) cold heavy cream, whipped to soft peaks. The result will be richer and denser but still smooth.
• If the mousse is too loose, it likely needs more chilling time or the cream and whites were under-whipped. Refrigerate it overnight before judging the texture.
• If it is grainy, the chocolate may have been too hot or the cream was over-whipped. Gently fold in 1–2 tablespoons of barely warm heavy cream to smooth it, then chill.

Serving and storage

Serve the mousse cold in individual glasses or ramekins. Keep it covered and refrigerated at 4°C (40°F) or below, and eat it within 2 days. Because the recipe contains eggs and dairy, do not leave it at room temperature for more than 2 hours, or more than 1 hour if the room is above 32°C (90°F). Do not freeze the finished mousse; freezing can make the texture watery and grainy after thawing.

Frequently asked questions

Can I make chocolate mousse the day before?

Yes. Cover the individual portions and refrigerate them overnight. The mousse usually becomes more fully set and easier to serve after several hours of chilling.

Why did my chocolate mousse turn grainy?

The chocolate may have overheated, come into contact with water, or been combined with ingredients at the wrong temperature. Whisk in warm heavy cream 1 teaspoon at a time, then fold gently until smooth.

Can I use milk chocolate instead of dark chocolate?

Yes, but the mousse will be sweeter and softer. Use 170 g (6 ounces) milk chocolate and reduce the sugar in the egg-white mixture to 1 tablespoon.

How do I know when the egg whites are whipped correctly?

They should look glossy and hold medium-stiff peaks. The peak should stand briefly when the whisk is lifted but still bend slightly at the tip. Dry, clumpy whites will be difficult to fold without losing volume.

Can I make this chocolate mousse without eggs?

Yes. Whip 360 ml (1 1/2 cups) cold heavy cream with the sugar until soft peaks form, then fold it into the cooled melted chocolate in two or three additions. The result will be richer and less airy than the egg-based version.