Beat the fat and sugar with the whisk of the hand mixer until foamy. Gradually stir in the eggs. Mix flour and baking powder and stir in by the spoonful. Halve the dough. Mix one half of the dough with cocoa and well drained cranberries.
Grease a cupcake tin (1.5 litre capacity), sprinkle a thin layer of breadcrumbs over it and fill in the dough alternately in layers. Bake in a preheated oven (electric: 175 °C/ gas: level 2) for about 1 hour.
Let it rest for 10 minutes. Turn out of the mould and let it cool down on a cake rack. Dust with some icing sugar. Makes about 16 pieces.