Roughly chop the cranberries. Cream butter, sugar, vanilla sugar, speculoose-spice and 1 pinch of salt. Stir in the egg. Mix the flour, almonds and baking powder, stir into the dough with the sour cream until it is smooth (the result is a fairly firm dough).
Using two teaspoons, place approx. 30 piles of dough on a baking tray lined with baking paper and flatten slightly. Sprinkle cranberries on top and press them lightly. Bake in the preheated oven (electric cooker: 175 °C/circulating air: 150 °C/gas: level 2) for about 20 minutes.
Allow to cool and dust with icing sugar.