Heat the butter. Stir in the oatmeal, then let cool. Stone the dates and cut into small cubes. Mix the eggs, sugar, vanilla sugar and baking powder together.
Add the dates and oat flakes, mix everything well and place small heaps on the baking sheet with 2 teaspoons. Bake in a preheated oven at 175 ° C for 15 to 20 minutes.