For the dough, knead the ingredients in a bowl with your hands until they are compact. Then loosen up into sprinkles and put the bowls in the fridge for 1 hour. This will make the crumbles firm and keep their shape better when baking.
Preheat the oven to 180 ° O / bottom heat. Line a tray and 2 underlays with baking paper or foil. After the cooling time mentioned above, loosen up the crumbles, which then stick together slightly, with a fork, mix both types loosely and distribute them in a "hill-shaped" manner on the tray and underlay (about 2 tablespoons per serving). Gently push the small portions together at the edges and then press them down very lightly with the palm of your hand.
The baking time is 15 minutes per tray. If you like them particularly crispy, sprinkle them with water after 10 minutes.
After baking, carefully pull the cookies including paper or foil from the tray onto a grid and let them cool completely. When warm, they are fragile. Lifting off the paper works best with a cake server. In doing so, some crumbles come off, but you can nibble them away ... because there is a risk of addiction with these little "things" .... ;-)))
The number of people mentioned above relates to a serving of around 23 pieces. (depending on size).