Strain the cherries and mix with 25 g sugar and kirsch, cover and let steep.
Remove 6 tablespoon of the milk, mix with the custard powder and the remaining sugar. Bring the remaining milk to the boil, remove from the hob and stir in the pudding powder mixture. Return to the hotplate and bring to the boil again while stirring.
Let the pudding cool down, covering the surface with foil to prevent skin from forming.
Whip the cream until stiff and fold it into the cold pudding.
Pour cherries and pudding into glasses in layers and sprinkle with chocolate.