Cream soft fat, 250 g sugar, vanillin sugar, lemon peel and eggs. Stir in flour, cornstarch and baking powder. Grease a ring mould (24 cm Ø) and sprinkle with breadcrumbs. Pour in the dough. Bake in a preheated oven (electric: 175 °C/ gas: level 2) for 50-60 minutes.
Turn out onto a cake rack and let it cool down. Cook pudding powder according to package instructions with remaining sugar. Leave to cool. For the filling, whisk butter until creamy white. Stir in the pudding by the spoonful. Slice the ring twice horizontally. Fill with half of the buttercream and with the jam. Spread 2/3 of the remaining cream all around the wreath. Press brittle with a dough scraper onto the wreath.
Slice the ring twice horizontally. Fill with half of the buttercream and with the jam. Spread 2/3 of the remaining cream all around the wreath. Press brittle with a dough scraper onto the wreath. Decorate the cake with the remaining buttercream and cherries. Keep cool until serving
Preparation time approx. 2 hours (without waiting time)