Stir pudding powder and 5 tablespoons of milk until smooth. Boil up the rest of the milk. Stir in pudding powder and simmer for about 1 minute. Season to taste with sweetener. Cool down.
Drain the cherries. Cream the fat, 1 pinch of salt and 200 g sweetness. Add lemon zest. Stir in the eggs one by one. Mix flour and baking powder. Alternately stir in lemon juice and sour cream.
Spread the dough into a greased fat pan. Stir the pudding until smooth and spread on the cake by the spoonful. Spread the cherries on top. Bake in the preheated oven (electric oven: 200°C/circulating air: 175°C/gas: level 3) for about 30 minutes.
Allow to cool and sprinkle with 2 tablespoons of sweetness.