Wash the plums, drain well, cut half and stone them. Cut the plums. Cream soft fat, 100 g sugar, vanillin sugar, lemon peel and salt.
Stir in 2 eggs one after the other, alternating with the cornflour. Mix 200 g flour and baking powder and finally stir in briefly together with the liqueur. Spread the dough on the greased, flour-strewn spring sheet (32 cm Ø).
Place the plums in flakes on the dough in a circle. Bake in the preheated oven, 2nd shelf from below (electric oven: 200 °C/ convection oven: 175 °C/ gas: level 3) for 30-35 minutes. In the meantime, grate the marzipan.
Add 80 g sugar and the remaining eggs and mix to a smooth mixture. Finally, stir in 30 g flour. Put the macaroon mixture into a piping bag with a large star-shaped spout. Take the pre-baked cake out of the oven and squirt two circles of macaroon tuffs on top.
Bake the cake for another 20 minutes. Let it cool down on a cake rack, take it out of the tin and arrange it on a cake plate. Serve dusted with icing sugar. Serve with a slightly whipped vanilla cream.