Preheat oven to 175 degrees. Drain the cherries and turn them in 25 g of flour.
Cut the softened butter into pieces. Grate 180 g of marzipan. Mix the butter with sugar and vanilla sugar until creamy. Stir in the marzipan, then stir in the eggs one by one. Mix 375 g flour with baking powder and stir alternately with the milk into the butter and marzipan mixture.
Put the dough in layers alternately with the cherries in a flour-dusted bundt cake pan, the last layer should be dough.
Bake the cake for about 1 hour on top and bottom heat. Cover with baking paper for the last 20 minutes. Then let the cake cool down.
Melt the couverture and coat the Gugelhupf with it.