Cream fat and 125 g sugar. Separate the eggs. Stir in the egg yolks bit by bit. Mix flour and baking powder and stir into the fat egg mass with the milk. Fill the dough into a springform pan (26 cm Ø) lined with baking paper and smooth it down.
Beat egg whites until very stiff. Sprinkle in the remaining sugar and cinnamon. Spread the meringue mixture on the dough. Bake in the preheated oven (electric cooker: 175 °C/ gas: level 2) for approx. 30 minutes. In the meantime, wash, halve and stone the plums.
Steam with 4 tablespoons of water and vanillin sugar for about 2 minutes, drain, drain and allow to cool. Let the cake base cool down on a cake rack. Cut through horizontally once. Whip the cream until stiff.
Spread the plums and cream on the bottom cake layer. Cover with the meringue base. Dust the cake with icing sugar and cinnamon. Makes 12 pieces.