Chocolate Mousse Recipe

Prepare ingredients

Bring eggs to room temperature (20–30 minutes) for better volume. Chop the dark chocolate finely so it melts evenly. Chill a mixing bowl and beaters for whipping cream if possible.

Melt chocolate and butter: Place chopped chocolate and butter in a heatproof bowl set over a saucepan of simmering water (double boiler) — water should not touch the bowl. Stir occasionally until melted and smooth. Remove from heat and let cool slightly (about 5 minutes).

Whisk egg yolks and sugar: In a medium bowl, whisk the 4 egg yolks with 25 g of the granulated sugar (reserve remaining sugar for egg whites) until pale and slightly thickened, about 1–2 minutes. Stir in vanilla extract.

Temper yolks into chocolate: Add a spoonful of the melted chocolate into the yolk mixture, whisk to loosen, then whisk in the rest of the chocolate until fully combined and glossy. Allow mixture to cool to lukewarm (so it won't cook the egg whites).

Beat egg whites: In a clean, dry bowl, add the 4 egg whites with a pinch of fine sea salt. Whisk to soft peaks, then gradually add the remaining 25 g granulated sugar and continue whisking to glossy stiff peaks (but not dry).

Fold whites into chocolate: Fold one-third of the beaten egg whites gently into the chocolate to loosen the mixture. Carefully fold in the remaining whites in two additions using a spatula — use wide strokes to preserve air. Stop when no large white streaks remain.

Whip cream: In the chilled bowl, whip 240 ml cold heavy cream to soft peaks. Reserve 2 tablespoons for garnish if desired. Gently fold the whipped cream into the chocolate-egg mixture in two additions until homogeneous and airy.

Portion and chill: Spoon or pipe the mousse into 6 serving glasses or ramekins (about 6 portions). Smooth tops, cover with plastic wrap (touching the mousse to prevent skin), and chill at least 3 hours or overnight until set and chilled through.

Line a baking sheet with parchment paper or a silicone mat and set a candy thermometer nearby if you have one.

Make toffee: In a small heavy-bottomed saucepan, combine 100 g granulated sugar, 40 g unsalted butter, and 1 tablespoon light corn syrup. Cook over medium heat, stirring until sugar dissolves. Stop stirring and let the mixture bubble; if using a thermometer, cook to 150–155°C (302–311°F) for a firm, crisp toffee. Without a thermometer cook until the mixture reaches a deep amber color (6–8 minutes), watching closely to avoid burning.

Finish and cool: Quickly stir in flaky sea salt if using, then pour the hot toffee onto the prepared sheet and spread thinly with a spatula. Let cool completely until brittle (about 20–30 minutes).

Crumble: Break the cooled toffee into small shards or pulse briefly in a food processor to make coarse crumbs. Transfer to a bowl and store in an airtight container until ready to use.

Make whipped cream: Chill a medium bowl and beaters. Pour 120 ml cold heavy cream into the bowl, add 1 tablespoon icing sugar, and whip to soft peaks. Do not overbeat — cream should be smooth and billowy.

Assemble: Remove mousse from fridge. Top each mousse serving with a dollop (about 1 tablespoon) of whipped cream. Sprinkle 1–2 teaspoons of crumbled toffee over the whipped cream and mousse surface per serving.

Finish and serve: Dust each serving lightly with cocoa powder and garnish with 1–2 fresh mint leaves. Serve immediately. Leftover mousse can be refrigerated up to 2 days (add toffee just before serving to keep it crisp).