Wash currants and raisins and dab dry. Soak currants, raisins, candied orange peel and candied lemon peel in rum for about 1/2 hour. Warm the milk, crumble yeast into it and stir it until it has dissolved.
Place flour, sugar, 170 g soft fat, cooled lard or beef fat, egg, salt, coriander, mace and bitter almond oil in a bowl. Add yeast milk and knead everything into a smooth dough using the dough hooks of the hand mixer.
Cover and leave to rise in a warm place for about 20 minutes. In the meantime, chop the walnuts coarsely in the universal chopper. Briefly knead the yeast dough on a floured work surface and roll out into a rectangle (40 x 30 cm).
Knead marzipan in pieces, soaked fruit, walnuts and egg yolk with your hands. Spoon by spoon on the yeast dough and press down with your hands. Wrap a third of the long side towards the middle and form into a stollen.
Place on a greased baking tray and leave to rise for about 20 minutes. Bake in the preheated oven (electric cooker: 250°C/ gas: level 5) for 5 minutes. Then turn the temperature down (electric oven: 175°C/ gas: level 2) and bake for about 1 hour.
Melt the butter and spread it on the still hot stollen. Leave to cool, dust with icing sugar. Results in about 25 slices.