Knead the ingredients for the dough well and let the dough rest in the refrigerator for about 30 minutes.
Roll out evenly on a floured work surface and cut out in various shapes. Cut out a shape in two different sizes for each double-decker. Possibly just take different sized glasses to cut out.
Place the biscuits on a baking sheet lined with baking paper and bake in a preheated oven at 180 ° C for about 10 minutes until golden brown.
For the double decker, let the biscuits cool down, then heat the jam in a small saucepan and put a dollop on the large biscuit, place the small biscuit on top and dust with a little icing sugar.