Put flour, almonds, 90 g sugar, salt and butter in flakes into a mixing bowl, first with the dough hooks of the hand mixer, then knead with your hands to a smooth dough. Wrap in foil and chill for about 1 hour. Form the dough into several rolls (approx. 1.3 cm Ø). Cut into 6 cm long pieces and form croissants. Place on 3 baking trays lined with baking paper.
Bake the trays one after the other in a preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for 13-15 minutes. Mix 75 g sugar and vanillin sugar. Take the croissants out of the oven, while still hot, carefully roll them with the top side in the sugar. Place on a cake rack and allow to cool
Waiting time 1 hour