Wash the raisins and dab dry. Cream butter, sugar and 1 pinch of salt. Stir in the eggs one by one. Mix flour, baking powder and baking soda, stir in briefly. Stir in raisins and oat flakes.
Using 1 tablespoon, place approx. 25 heaps with sufficient space between them on 3 baking trays lined with baking paper. Press flatter with your hands (approx. 6 cm Ø). Bake in the preheated oven (electric cooker: 175°C/circulating air: 150°C/gas: level 2) for approx. 10 minutes.
Let it cool down on the baking paper, then remove carefully.