Melt the couverture over the water bath and let it cool down.
For the dough, beat butter with 250 g sugar and 1 point vanilla sugar until frothy. Add the 4 eggs one after the other and stir in for 1 minute each. Stir in the couverture. Mix the flour, cocoa and baking powder and stir into the dough alternately with the cream.
For the cheesecake core, beat the 2 eggs with 100 g sugar and 1 point vanilla sugar until frothy. Stir in the quark and pudding powder.
Pour two thirds of the dough into the pan and spread a little on the edge. Pour the curd mixture into the depression and distribute the rest of the chocolate dough on the curd mixture. Bake in the oven for 50 - 60 min at 175 ° C top / bottom heat.