Wash, halve and stone the plums. Coarsely grate the marzipan. Cream soft fat, 200 g sugar, vanillin sugar, bitter almond oil and salt. Add marzipan and stir well. Stir in the eggs one after the other. Mix flour, starch and baking powder and stir in.
Pour the dough into a greased, floured fat pan of the oven (32 x 39 cm) and smooth it down. Spread plums on the dough and sprinkle with 50 g sugar and flaked almonds. Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for 40-50 minutes. Cover the last 15 minutes with aluminium foil if necessary. Let the cake cool down in the baking tray. Whipped cream tastes good with it