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 (26 cm Ø). Add half of the dough and smooth it down
Beat 2 egg whites with the whisks of the hand mixer until stiff, pour in 100 g sugar. Spread the beaten egg whites loosely on the dough. Sprinkle 20 g almonds over it. Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for 25-30 minutes. Remove from the oven, place on a cake rack, carefully remove from the edge of the springform pan and allow to cool. 3. Beat 2 egg whites until stiff, pour in 100 g sugar. Fill the rest of the dough, beaten egg whites and almonds into the tin and bake. Let it cool down
In the meantime, clean, wash and cut the rhubarb into small pieces. Put 100 ml water, 50-75 g sugar and rhubarb in a pot, bring to the boil, cover and simmer for about 5 minutes. Stir pudding powder and 4 tbsp. water until smooth, stir into the boiling rhubarb, bring to the boil again and simmer for about 1 minute, stirring continuously. Let cool off
Place a cake base on a cake plate, spread warm groats evenly on top, chill
Whip the cream until stiff, pour in 2 sachets of vanillin sugar. Spread the cream on the cooled groats, place the second cake base on top and dust with icing sugar
waiting time approx. 3 1/2 hours