Preheat the oven to 180 ° C. Beat the butter with the two types of sugar until frothy. Gradually stir in the eggs and milk. Sift the flour and baking powder and mix in. Finally, carefully fold in the oat flakes and cranberries.
Cut off 1 heaped teaspoon from the dough and place on the baking sheet lined with baking paper. Leave a gap of approx. 4 cm in each case. Bake in the preheated oven for approx. 12-15 minutes until golden brown.