Chop the plums. Boil 60 ml water. Pour brandy and hot water over the plums and let them soak for about 10 minutes. In the meantime, stir fat, sugar and syrup until creamy with the whisk of the hand mixer.
Add the eggs bit by bit while stirring. Mix flour, baking powder and spices and stir in. Fold plums with liquid and currants into the dough. Fill into a greased box form (2 litre capacity) and smooth it down.
Bake in a preheated oven (electric: 150 °C/ gas: level 1) for 1 1/4 hours. Allow to cool and turn out of the pan. Dust with icing sugar. Makes 14 pieces.