Mix flour, sugar, vanilla sugar and 1 pinch of salt in a large mixing bowl.
1⁄4 l Warm milk lukewarm, crumble yeast into it and dissolve it while stirring. Add butter in flakes and 1 egg to the flour mixture. Add yeast milk and knead everything with a hand mixer for at least 5 minutes.
Cover and leave in a warm place for about 45 minutes until the volume has approximately doubled.
Knead the dough on a lightly floured work surface again with your hands. Divide into 3 pieces. Form each piece into a strand (approx. 40 cm long) on a little flour. Place the 3 strands next to each other and press the ends together on one side.
Braid strands to the braid. Press the dough ends together. Place diagonally on a baking tray lined with baking paper. Cover and leave to rise in a warm place for about 30 minutes.
Por photo: Whisk together the forest, waiting egg yolk and 2 tablespoons of milk. Spread the plait for about 15 minutes and sprinkle with sugar crystals. Bake in a preheated oven (electric cooker: 200 °C/circulating air: 175 °C/gas: see manufacturer) for approx. 35 minutes. Let cool down on a cake rack.
It goes well with butter.