Preheat the oven at 180 degrees Celsius.
Whip the egg whites to a hard foam with an electrical mixer.
Continue mixing slowly and adding the sugar and vanilla sugar until you get a shiny foam.
Add the almond flour, flour, salt and vanilla sugar and stir gently together.
Place a baking paper on a baking sheet.
Spoon up some batter and with your hand form small balls. Place on the baking paper.
Take out and let cool down.