Melt the Chocolate: In a heatproof bowl, gently melt the dark chocolate over a double boiler. Stir until silky smooth. Remove from heat and stir in the cooled espresso and chocolate liqueur. Let cool to room temperature.
Incorporate the Egg Yolks: Beat the egg yolks into the cooled chocolate mixture, one at a time, ensuring a smooth blend.
Whip the Cream: Whip the cold cream until it begins to thicken (about 2 minutes). Gradually add the sugar and continue whipping until stiff peaks form (another 2–3 minutes). Keep chilled until ready to use.
Beat the Egg Whites: In a clean bowl, beat the egg whites with a pinch of salt until they reach soft peaks (about 3 minutes).
Combine and Fold: Gently fold the whipped cream into the chocolate mixture in three additions, working carefully to maintain the light texture.Next, fold in the beaten egg whites one-third at a time, folding just until no streaks remain.
Chill the Mousse: Spoon the mousse into 6 serving dishes. Cover with plastic wrap and refrigerate for at least 4 hours, or ideally overnight, to allow the mousse to set completely.
Garnish and Serve: Just before serving, garnish the mousse with your choice of toppings for a final touch. Enjoy!
If you don’t have Mozart Chocolate Liqueur, you can substitute it with other liqueurs that complement the rich chocolate and espresso flavours.
Great options include:
For a relaxing atmosphere in the kitchen I recommend my personal Elle Republic: Chilled Out Kitchen Tunes Playlist on Spotify.