4 ounces finely chopped dark chocolate (around 70%)
2 tablespoons unsalted butter, cut into small pieces
2 egg yolks + 2 egg whites
1/4 teaspoon cream of tartar
3 tablespoons granulated sugar, divided use
1/2 cup heavy whipping cream
1/2 teaspoon vanilla extract
Stir together chocolate and butter, in a large bowl, set over a large saucepan with an inch or two of simmering water. Stir until melted and smooth. Remove bowl from heat and whisk in egg yolks until combined. Cool chocolate to room temperature.
In a large mixing bowl, using a mixer on high speed, beat egg whites and cream of tartar until stiff peaks form; beat in 1 tablespoon sugar until combined.
In a large mixing bowl, using a mixer on high speed, beat cream, vanilla and remaining 2 tablespoons sugar until soft peaks form.
Fold egg whites into chocolate mixture, followed by whipped cream until combined. Divide mousse into 4 ramekins. Chill until ready to serve.
Makes 4 servings