For the wholemeal must cookies, crumble wholemeal flour with the cold butter, add salt and cardamom and knead in must. Form the dough into a ball and chill.
Form a roll from the dough ball, roll it out on a floured work surface. Cut out circles with a round cookie cutter and place each dough circle in a plastic folding mold for dumplings, fill with jam, close the mold and close the dumpling tightly in this way.
If you don’t have a folding mold, fill the dough circle with some jam, fold it and press the edge tightly with a fork.
Bake in the oven on a tray lined with baking paper for about 10 minutes, turning the wholemeal must cookies in the powdered sugar while they are still hot so that it sticks.