Chocolate Mousse
Chocolate mousse: the airy French classic built on whipped whites and 70% cacao. Understand the physics behind that cloudlike texture and the right melt.
25 min
Medium
Francesa
4 servings
The story behind
Whipping egg whites is really a way of trapping air inside a net of protein, and that single act holds the whole secret of chocolate mousse. The name gives it away: "mousse" is French for foam, and the dessert spread through nineteenth-century France once cooks applied to chocolate the aerating trick they already used in savory dishes. The texture is pure physics. Beaten whites hold thousands of tiny bubbles, and folding them in gently, never stirring, keeps those bubbles intact and gives the mousse its airy, cloudlike lift. Stir too hard and the air escapes, leaving a heavy pudding. The dark chocolate melts with butter so the fat keeps it silky, and it must cool to lukewarm before joining the rest: too hot and it scrambles the yolks and collapses the foam; too cold and it seizes into lumps. Yolks bring emulsion and richness; whites bring air. Then the chill does its work, a few hours setting the cocoa butter just enough to give body without sacrificing softness. Serve it cold in a glass, the deep scent of seventy-percent cacao rising to meet you.
Instructions
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1Melt the dark chocolate together with the butter in a double boiler until you get a smooth and glossy mixture.
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2Remove from heat and let cool slightly. Incorporate the yolks one by one, whisking gently.
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3In a separate bowl, beat the egg whites with a pinch of salt until soft peaks form. Add the sugar and continue beating until firm.
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4Fold one-third of the egg whites into the chocolate mixture to lighten it.
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5Gently fold in the remaining egg whites using slow movements to avoid losing the air that gives the characteristic texture.
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6Pour the mixture into individual glass ramekins.
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7Refrigerate for at least 4 hours until firm yet airy.
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8Serve chocolate chunks to highlight its origin.
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