Traditional Belgian vanilla waffles

Preparation

Preparation time: 15 min.
Number of waffles: 36
Store in a plastic container
Separate the egg yolks from the egg whites.
Beat the egg yolks, then add the sugar and vanilla sugar and continue beating.
Then add the melted butter and a pinch of salt and continue beating. 
Next add the flour and beat until smooth.
In a separate bowl, whisk the egg whites until stiff and gently fold them into the mixture.
Take your FRITEL waffle iron with the 4x7 or 6x10 waffle plates, set the thermostat to setting 4 or 5 and let your waffle iron preheat.
Put the batter into the waffle iron, close it and bake for about 2 min.