Sieve the flour into a bowl. Melt butter and let it cool down. Warm the milk lukewarm and stir in the sweetness and yeast. Pour flour into a bowl. Knead butter and egg yolk with the dough hooks of the hand mixer, gradually adding yeast milk. Knead the dough with your hands until smooth. Cover and leave to rise in a warm place for about 30 minutes.
Knead the dough well on a floured work surface and roll out into a rectangle (20x30 cm). Spread the jam on the dough. Roll up the rectangle from the long side and cut into 3 cm wide pieces. Place the cut side of the snails on a baking tray lined with baking paper. Cover and let them rise for another 20 minutes. Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for 18-20 minutes
Waiting time approx. 50 minutes / 2 BE