Separate eggs. Cream fat, 100 g sugar and vanillin sugar. Add the egg yolks and stir until creamy. Mix flour, almonds and baking powder and knead. Press the dough into a greased springform pan (26 cm Ø) at the bottom and press it 3-4 cm high at the edge of the springform pan.
Prick the dough base several times with a fork. Put the mould in a cool place. Wash plums, drain well and cut into fine pieces. Mix with cornflour. Beat the egg white until stiff and finally add the remaining sugar. Carefully mix the plums and beaten egg white and place in the mould. Smooth a little and bake in the preheated oven on the lowest shelf (electric oven: 175 °C / gas: level 2) for about 1 hour. Cover if necessary in the last 15-20 minutes. Leave the finished cake to stand for approx. 5 minutes in a switched-off oven. Then let the cake cool down in the mould on a cake rack.
Smooth a little and bake in the preheated oven on the lowest shelf (electric oven: 175 °C / gas: level 2) for about 1 hour. Cover if necessary in the last 15-20 minutes. Leave the finished cake to stand for approx. 5 minutes in a switched-off oven. Then let the cake cool down in the mould on a cake rack. Roast the almonds in a pan without fat and let them cool down. Remove the cake from the tin, sprinkle with almonds and icing sugar and serve. Makes approx. 12 pieces