Drain the cherries well on a sieve, collecting the juice. Put 400 ml water, lemon juice and cherry juice in a pot. Stir pudding powder, 50 g sugar and 4-5 tablespoons of juice until smooth.
Boil up the rest of the juice. Stir in the pudding powder and bring to the boil again while stirring. Remove from the heat and carefully fold in the cherries. For the wafer dough, whisk the fat, 100 g sugar, salt and 1 packet vanilla sugar with the whisk of the hand mixer until foamy.
Stir in the eggs one by one. Alternately stir in flour, baking powder, 250 g sour cream and 250 g cream. Place 1 1/2 tablespoon in the middle of each greased preheated waffle iron and bake until golden brown.
Bake about 20 waffles one after the other. Whip the rest of the cream and sour cream with the whisk of the hand mixer, pour in 1 sachet of vanilla sugar. Dust the waffles with icing sugar.
Serve decorated with lemon balm. Serve with sour cream and cherries extra. Makes about 20 waffles.