Mix the chopped marzipan and the fat until frothy. Alternately add sugar, vanilla sugar and eggs and keep stirring until the sugar has dissolved. Gradually stir in the flour and baking powder. Put 3/4 of the dough on a greased baking sheet. Spread the well drained cherries on the mass. Put the rest of the batter on the cherries. Bake at 190 ° C (160 ° C fan oven) for about 25-30 minutes.