Sort the blackberries and wash if necessary. Wash the currants and remove them from the stalks.
Grease a fat pan (approx. 32 x 39 cm; at least 3.5 cm deep) and sprinkle with breadcrumbs. Beat cream, eggs, 250 g sugar, vanilla sugar and 1 pinch of salt with the whisks of the mixer until foamy.
Mix flour and baking powder, stir in portions briefly. Spread the dough on the fat pan. Bake in the preheated oven (electric cooker: 175 °C/circulating air: 150 °C/gas: see manufacturer) for approx. 10 minutes.
Melt the butter. Take the cake out of the oven. Spread fruit on top. Pour butter over it, sprinkle with 75 g sugar and almonds. Bake the cake immediately at the same temperature for about 30 minutes.
Let it cool down. Dust with icing sugar.