Coarsely chop the pistachios. Mix 150 g sugar, pistachios and 300 g flour in a bowl. Add 200 g butter in flakes and quickly work into crumbles with the whisk of the hand mixer. Put the crumbles in a cool place. Mix 400 g flour, yeast, 50 g sugar, vanillin sugar and salt in a bowl. Melt 60 g butter in a saucepan, add 200 ml cold milk and pour the lukewarm mixture into the bowl to make the flour mixture.
Add the egg and knead everything with the dough hooks of the hand mixer for about 4 minutes. Cover and leave to rise in a warm place for about 45 minutes. After about 30 minutes bring 440 ml milk to the boil. Stir pudding powder, 6 tablespoons of milk and 40 g of sugar until smooth and stir into the boiling milk. Let the pudding boil for about 1 minute, then take it off the stove. Line 2 baking trays with baking paper. Roll out the yeast dough on a floured work surface about 4 mm thin and cut out circles (about 8 cm Ø). Knead the remaining dough again and cover. Let dough circles rise for another 15-20 minutes with the lid on. Put 2-3 tablespoons of pudding on each circle and sprinkle with crumbles. Bake the 2 trays one after the other in a preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for about 20 minutes. Let the baked particles cool down on a cake rack.
Knead the remaining dough again and cover. Let dough circles rise for another 15-20 minutes with the lid on. Put 2-3 tablespoons of pudding on each circle and sprinkle with crumbles. Bake the 2 trays one after the other in a preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for about 20 minutes. Let the baked particles cool down on a cake rack. Roll out the remaining dough again and cut out. Place the pastry on a baking tray and leave to rise for 15-20 minutes. Spread the pudding and crumble on the pastry and bake