Mix the butter, sugar, eggs and vanilla sugar until frothy. Sieve the flour and baking powder onto the foam mixture, grate the chocolate and pour in the mulled wine. Process all ingredients into a smooth dough. Spread the dough on a baking sheet lined with baking paper and smooth it out. Bake in an oven preheated to 160 ° for approx. 20 minutes. Let cool down on the baking sheet.
For the glaze, mix the powdered sugar with 4 - 5 tablespoons of mulled wine until smooth. Brush the pastry sheet with it. You can sprinkle 100 g of chopped almonds on top. Let dry for an hour. Cut into 3 x 4 cm sections.