In a large bowl, knead all the ingredients by hand and then finish working on the well-floured board and roll out to about 5 mm thick. Flour the board again and again.
Cut out circles approx. 8 cm in diameter. Place 1 teaspoon of jam or Nutella in the middle, fold the circle together (crescent moons appear). Press the edges on and press in the edges a little more with a fork.
Place on a baking sheet lined with baking paper and bake in a preheated oven at 170 ° for about 15-20 minutes. When cold, sprinkle thickly with powdered sugar.