First beat the melted butter with sugar, vanilla sugar and eggs. Then mix together the oat flakes, flour and salt. Now mix both, shape the dough into balls and place on a baking sheet. Press these beads flat with your fingers (leave a large gap between the beads as they will run).
Bake for 10 - 15 minutes at 180 ° C in a preheated oven, remove from the oven and, after cooling, decorate with chocolate.