Separate eggs. Cream fat, salt, 1 packet of vanilla sugar and 125 g sugar with the whisks of the hand mixer. Stir in the egg yolks one by one. Mix flour and baking powder and stir in alternately with the milk.
Grease a springform pan (20 cm Ø). Add half of the dough and smooth it down.
Beat 2 egg whites until stiff, pour in 100 g sugar. Spread the beaten egg whites loosely on the dough. Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: see manufacturer) for 25-30 minutes.
Remove, place on a cake rack, carefully remove from the edge of the mould and out of the mould. Let the base cool down. Clean the springform pan.
Beat 2 egg whites until stiff, pour in 100 g sugar. Fill the rest of the dough and beaten egg whites into the tin and bake. Let it cool down.
In the meantime wash the currants and remove them from the panicles. Put 100 ml water and 50 g sugar in a pot, bring to the boil, cover and simmer for about 5 minutes. Add currants and bring to the boil again.
Stir pudding powder and 4 tablespoons of water until smooth, stir into the boiling currants, bring to the boil again and simmer for about 1 minute, stirring continuously. Leave to cool.
Place a cake base on a cake plate, spread warm groats evenly on top, chill. Whip the cream until stiff, pour in 2 packets of vanilla sugar. Spread the cream on the cooled groats, place a second cake base on top and dust with icing sugar.