Mix 125 g butter and sugar with the dough hooks of the hand mixer. Stir in the eggs one after the other. Set aside 2 tablespoons of cranberries and 50 g almonds for decoration. Add quark, candied orange peel, candied lemon peel, rest of cranberries, 150 g almonds and rum and mix well.
Mix flour and baking powder and stir in. Roll out the dough on a floured work surface in a rectangular shape (approx. 45 x 30 cm). Whip the long side twice to the middle (2/3 of the surface) and press firmly.
Turn the other 1/3 towards the middle and press firmly. Place the stollen diagonally on a baking tray lined with baking paper. Bake in a preheated oven (electric range: 175 °C/ convection oven: 150 °C/ gas: level 2) for 50-60 minutes.
Melt 125 butter. Remove the finished stollen from the oven, brush with butter and sprinkle with icing sugar. Repeat until sugar and butter are used up. Sprinkle with cranberries and almonds and serve hot or cold with butter.