Sieve the flour onto the work surface, make a depression in the middle and add the milk. Spread the fat in flakes, vanillin sugar, 75 g icing sugar and walnuts on the edge of the flour. Knead into a smooth dough with your hands and refrigerate for 30 minutes. Form croissants with floured hands and place them on a baking tray lined with baking paper. Bake the croissants one after the other in a preheated oven (electric: 175°C/ gas: level 2) for 13-15 minutes. Dust the still warm croissants with the remaining icing sugar. Results in approx. 45 pieces