Here's what you will need to make this at home:
6 ounces semi sweet chocolate (high quality)
4 tablespoons unsalted butter, softened
4 large eggs, separated and at room temperature
1/2 cup plus 2 tablespoons sugar
1/4 teaspoon instant coffee granules or instant espresso
2 tablespoons water
pinch of salt
1 teaspoon pure vanilla extract
1 cup heavy whipping cream
chocolate shavings for garnish
berries for garnish
Place chocolate, butter, coffee granules, salt and water in a heat proof bowl over simmering water. Make sure that the bottom of the bowl doesn't touch the hot water. It will burn your chocolate!!!! EEEK!
Keep mixing the chocolate until it is completely melted. Remove from heat.
Beat egg yolks until pale.
Add some of the melted chocolate to the egg yolks to temper them (raise their temperature). Add the egg mixture to the chocolate mixture and place the bowl over the simmering water. Keep mixing until it thickens. About 1-2 minutes.
Remove from heat and add the vanilla extract. Mix well. Allow to cool at room temperature.
Whisk the egg whites with the half cup of sugar with an electric mixer on high speed until stiff peaks form.
Fold the egg whites into the cooled chocolate mixture.
Whip the heavy cream with the two tablespoons of sugar with a mixer until stiff peaks form. Fold into the chocolate.
Divide the mousse into 6-8 serving bowls and refrigerate for at least 4 hours up until overnight before serving.
Garnish with more whipped cream, berries and chocolate shavings.