Put the flour in a bowl. Make a depression in the middle. Crumble yeast into it. Heat 100 ml milk and 2 tablespoons sugar. Pour the yeast into the hollow. Mix with some flour to the pre-dough. Cover and leave to rise in a warm place for about 15 minutes
Heat 100 ml milk. Remove 3 tablespoons of milk and mix with espresso powder and 1 teaspoon of cocoa. Melt 200 g fat in remaining milk and cool. Add salt, vanillin sugar and 50 g sugar to the pre-dough. Knead everything to a smooth dough. Cut the dough in half and knead the espresso-cocoa milk into one half. Let both dough halves rise for about 45 minutes
Roughly chop the nuts. Dice nougat. Knead light dough with nuts, dark dough with nougat. Roll out both doughs on a little flour to a rectangle (approx. 22 x 30 cm). Place the dark dough on top of the light one and fold in 2/3 of the dough from the long side. Place on a greased baking tray. Leave to rise for about 30 minutes.
Bake the black and white stollen in a preheated oven (electric range: 200 °C / convection oven: 175 °C / gas: level 3) for approx. 10 minutes first. Then continue baking at 175 °C (fan oven: 150 °C / gas: level 2) for approx. 30 minutes
Melt 50 g fat and spread it on the warm stollen. Dust with icing sugar. Sprinkle 1 teaspoon of cocoa in wide strips on top