Mix the butter, sugar, vanilla sugar, salt and marzipan until creamy. Stir in eggs one at a time. Add lemon juice. Mix the flour and baking powder, sieve onto the egg mixture and carefully fold in. Spread the batter in a deep dripping pan. Top with cherries and sprinkle with sugar.
Bake in the oven preheated to 175 ° for about 30 minutes.
For the topping, stir all the ingredients, pour over the cherries and bake for another 20-30 minutes.