Melt 75 g butter. Mix flour, white sugar, salt and vanillin sugar. Add the egg yolks. Warm milk lukewarm, crumble yeast into it and dissolve in it. Add butter and yeast-milk mixture to the flour mixture.
Knead everything into a smooth dough. Cover and leave to rise in a warm place for about 40 minutes. Knead the dough again. Roll out on a lightly floured work surface to 2 plates of 30 x 30 cm each and roll up. Cut each into approx. 10 pieces. Place the rolls with the cut side facing upwards on a greased, flour-spread sheet (glass sheet; 22 x 28 cm; measured inside). Leave to rise again for another 20 minutes. Lightly press 100 g butter in flakes into the dough. Sprinkle with flaked almonds and hazelnuts and brown sugar.
Place the rolls with the cut side facing upwards on a greased, flour-spread sheet (glass sheet; 22 x 28 cm; measured inside). Leave to rise again for another 20 minutes. Lightly press 100 g butter in flakes into the dough. Sprinkle with flaked almonds and hazelnuts and brown sugar. Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for about 20 minutes. Cover if necessary