Separate the egg. Stir egg yolk, starch, sugar and 4 tablespoons of milk until smooth. Bring the rest of the milk, salt and espresso powder to the boil while stirring. Remove the pot from the stove. Stir in the starch and bring to the boil again. Let the pudding cool down a little while stirring occasionally
Meanwhile beat the egg whites until stiff and fold them into the lukewarm mocka pudding. Divide into 4 dessert glasses and let them set in the fridge for about 2 hours
Whip cream and vanilla sugar until semi-solid. Fold in liqueur. Spread the cream as a cap on the cups. Peel off the chocolate, e.g. with a peeler, and sprinkle over the rolls
For children, you can omit the Amaretto liqueur and instead add 1-2 drops of bitter almond aroma to the whipped cream