For the nut shortbread cookies, quickly knead flour, baking powder, butter pieces, sugar, vanilla sugar, nuts and yolks and refrigerate for about an hour.
Roll out the dough on a floured work surface to a thickness of approx. 2 mm and cut out any desired shapes, bake at 170 °C for approx. 8 minutes.
Let the cookies cool, stick together with jam and dip one half of each nut shortbread cookie in chocolate glaze.