Wash the plums well and remove the stones.

Grease the springform and line with baking paper. Preheat the oven to 180 ° C.

Beat the egg whites with a pinch of salt until stiff.

Coarsely grate the marzipan and whip together with the butter, egg yolk, vanilla pulp and sugar until creamy.

Mix flour with baking powder and stir well into the cream.

Carefully fold the egg whites into the dough, place in the springform pan and stick the plums upright in the dough.

Bake the cake at 180 ° C for about 45 minutes.