Jam Biscuits

Combine flour, baking powder, sugar, vanilla sugar, salt, butter cut into pieces, egg and ground hazelnuts. Knead to a smooth dough and shape into a ball. Wrap in plastic wrap and refrigerate for 30 minutes.

Roll out dough on a floured surface until about 0.4 cm (approximately 1/5 inch) thick and cut out star-shaped cookies with a cookie cutter. Cut out small stars in the middle of cookies to fill with jam later on (being careful not to puncture dough at the base) Place cookies on a lined with parchment paper baking sheet and bake in preheated oven at 180°C (approximately 350°F) for about 12 minutes or until golden. Remove and allow to cool slightly.