Mix the flour, sugar, vanilla sugar, milk, eggs, oil, baking powder and salt to a smooth batter.
Heat up the donut maker and brush with a little oil. Pour 1 level tablespoon of batter into each of the rings. Close the device and bake the donuts for approx. 3-4 minutes until golden brown. Process the rest of the dough in the same way. Then sprinkle the donuts with powdered sugar while they are still warm.
My tip: eat and enjoy while they are still warm, they taste better that way.