Put flour, 50 g sugar, salt, vanillin sugar and egg into a mixing bowl and crumble the yeast over it. Heat milk and fat, add and knead with the dough hook of the hand mixer to a smooth yeast dough.
Cover and leave to rise in a warm place for about 30 minutes. In the meantime, wash and stone the plums. Knead yeast dough with floured hands again. Roll out the dough in a greased fat pan.
Place the plums on the dough and sprinkle with 50 g sugar. Bake in the preheated oven (electric oven: 200°C/ gas: level 3) for 40-45 minutes. In the meantime, beat the egg white and lemon juice until stiff.
Add the remaining sugar and almonds and stir in. Crumble the marzipan onto the egg whites and stir in with the whisk of the hand mixer. Pour the macaroon mixture into a piping bag with star-shaped spout and spray a grid on the cake approx. 12 minutes before the end of the baking time and finish baking.