Warm the milk lukewarm. Crumble yeast into it and dissolve. Put 500 g flour, 50 g sugar, 1 pinch of salt, cardamom, egg and 75 g butter in a bowl. Add yeast milk and knead to a smooth dough with the dough hooks of the hand mixer.
Cover and leave to rise in a warm place for about 30 minutes.
Melt 50 g butter. Mix 5 tablespoons sugar and cinnamon. Knead the soft dough on some flour and roll out to a rectangle (approx. 20 x 50 cm). Spread with butter, up to 1 tablespoon, and sprinkle cinnamon sugar, up to 1 tablespoon, on top.
Roll up the dough from the long side and cut into 16 slices (approx. 3 cm wide). Place 5-6 snails each on a baking tray lined with baking paper and press slightly flatter (approx. 10 cm Ø).
Cover and leave to rise for about 20 minutes.
Bake one after the other in a preheated oven (electric oven: 200 °C/circulating air: 175 °C/gas: see manufacturer) for 10-12 minutes. Melt the rest of the butter again and spread it immediately on the hot snails.
Sprinkle with cinnamon sugar. Bake the remaining snails in the same way. Taste lukewarm and cold. Drink tip: coffee.