Preheat the oven to 190 ° C and grease the muffin tray well. Wash, peel and cut the pears. Mix the butter, sugar and gradually the eggs, vanilla sugar and milk until frothy. Add the flour, baking powder and the pear pieces and stir in. Then fill the dough into the molds, sprinkle with the sugar and bake for about 20-25 minutes.