Mix flour with baking powder. Cut the cold butter into pieces and crumble with the flour. Add the remaining ingredients and quickly knead into a dough. Let rest in a cold place for about 1 hour.
Roll out the dough thinly. Cut out biscuits and cut out a small hole in the middle of half of the biscuits.
Bake at 200 ° C for about 10-12 minutes.
Let the finished biscuits cool down. Brush the unperforated biscuits with jam and place the perforated and sugared biscuits on top.