Use a peeler to remove small rolls from the chocolate. Whip the cream until stiff and chill
Separate eggs. Place the egg yolks, vanilla sugar and sugar in a round metal bowl and whisk over a warm water bath with the whisks of the hand mixer until thick and creamy white (10-15 minutes). Stir in rum and coffee
Beat 3 egg whites with the whisks of the hand mixer until stiff. Use the rest of the egg white for other purposes. Remove the egg yolk mixture from the bain-marie, fold in the beaten egg whites in portions and immediately fill into cups or dessert bowls. Dress with a dollop of cream, chocolate rolls and cocoa (must not stand for long, otherwise it will settle).