This step should be done ideally the day before, but at least 1 hour before baking. Wash the raisins and drain them in a colander. Place in a bowl with the lemon and orange peel and chopped almonds. Add the rum to ingredients and mix well. Cover the bowl and leave the flavours to infuse overnight. This will prevent the raisins from drying out the dough too much.
The next day preheat your oven to its lowest setting. Mine is 50°C or 122°F.
Add the sugar and yeast into the lukewarm milk. At leave to rest for 10 minutes. You should see bubbles forming on the surface. If you cannot see bubbles then the milk might have been too hot and you will need to start again.
Place the butter, flour, cardamon, salt and fresh lemon peel into a mixing bowl. Pour in the milk/yeast mixture and knead the dough for about 5 minutes to a smooth mass using a hand-or stand mixer. Turn off your oven, cover the dough with a tea towel and place it in the oven for about 30 minutes to rise.
Now knead the dough through again and carefully work in the rum-soaked dried fruit.
Divide the dough in half and place each half into a bread pan. Cover them with a tea towel. Leave to rise for a further hour. If your house is cold, you can place them back in the turned-off oven. It should still be warm.
Preheat your oven to 180°C or 356°F top to bottom heat. (Remove the rising Klaben first if necessary) Bake the Klaben for approx 60 minutes. If the top browns too much cover it with a piece of foil or baking parchment. To check if it is done, prick a skewer in the middle. If it comes out clean, it is ready.