Soak the gelatine in cold water. Warm the milk and dissolve the coffee in it. Squeeze out the gelatine and dissolve in it. Let it cool down a little. Separate the eggs. Whisk the egg yolks. Gradually stir the lukewarm mocka milk into the egg yolk. Cool until the mixture is half firm
Beat egg whites until stiff. Gradually add sugar. Fold the beaten egg whites into the mocka mass. Whip cream until stiff. Chill 4 tbsp. cream in a piping bag. Fold the remaining cream into the cream and chill for at least 1 hour.
Spray cream tuffs onto the cream and sprinkle with advocaat. Decorate with cappuccino rolls, some instant coffee and possibly grated oranges
Sprinkle the mocka mousse with whiskey-cream liqueur (e.g. Baileys) or - without alcohol - with vanilla sauce instead of eggnog