For the waffles, preheat the waffle iron. In a bowl, mix the flour with the baking powder. Beat the eggs in another bowl with a mixer until foamy and gradually stir in the sugar, vanilla sugar, flour, baking powder mixture and a pinch of salt.
Add the butter and into the waffle batter – again stir everything well. Now grease the hot waffle iron with oil or butter. Now pour in the batter and bake until golden brown.
Finally, garnish with banana pieces and chocolate sauce.