Knead the flour, baking powder, sugar, vanilla sugar, egg, salt, butter in flakes and the ground nuts into a smooth dough. Let the dough rest in the refrigerator.
Chop the remaining walnuts, mix with the marzipan, powdered sugar, cocoa and the jam to a smooth mass.
Take the dough out of the refrigerator, roll out and cut out circles (diameter approx. 7 cm). Put a teaspoon of marzipan filling on each circle, press two sides upwards together.
Bake at 170 ° C on the middle rack for 12-14 minutes.