Roughly chop the biscuits. Cream fat, sugar and vanilla sugar with the whisk of the hand mixer. Stir in the eggs one by one. Add sour cream and stir in. Mix flour, almonds, baking powder and salt and stir into the dough. Fold in the biscuits with a wooden spoon.
Grease the cake tin (23 cm Ø, 2 litres capacity) and dust lightly with breadcrumbs. Fill in the dough and smooth it down. Bake in the preheated oven (electric cooker: 175 °C/ circulating air: 150 °C/ gas: level 2) for approx. 1 hour. Take out and let cool in the form for about 5 minutes. Turn out the cake and let it cool down. Dust the cake with icing sugar and decorate with small biscuits
Waiting time approx. 30 minutes