Melt 125 g butter in a saucepan. Pour in milk and remove from the stove. Mix flour, 100 g sugar, vanillin sugar, salt and yeast in a bowl. Add egg. Add milk-butter mixture and knead everything with the dough hooks of the hand mixer to a smooth dough.
Cover and leave to rise in a warm place for about 40 minutes. Then knead again well. Roll out to a rectangle (approx. 35 x 40 cm) on a floured work surface. Place the dough on the greased fat pan of the oven. Cover and let it rise again in a warm place for about 15 minutes. In the meantime, dice 175 g butter. Use a spoon handle to press hollows into the yeast dough. Spread the butter cubes evenly. Sprinkle with almonds and 150 g sugar.
In the meantime, dice 175 g butter. Use a spoon handle to press hollows into the yeast dough. Spread the butter cubes evenly. Sprinkle with almonds and 150 g sugar. Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for 20-25 minutes. Let it cool down on a cake rack
waiting time approx. 2 1/2 hours