Pour flour into a bowl, add baking powder, salt, sugar, vanilla sugar. Mix everything together.
Add milk, eggs and vegetable oil or melted butter. Mix with a mixer or stir with a whisk into a smooth batter. The batter can be set aside to rest (for approximately 15 minutes), but it is not necessary.
Heat the waffle iron. Bake waffles until golden color for approximately 3 - 3.5 minutes or for the time given in the waffle iron instructions. Pour batter with a ladle, then spread the batter evenly across the entire surface with the rounded side of the ladle.
After baking, set the waffles aside on a wire rack.
Sprinkle with powdered sugar.
Serve with your favorite toppings such as jam, jelly, maple syrup, fruit and whipped cream.