Possibly roast whole nuts without fat and skin them roughly. Dice nougat and marzipan. Beat the fat, sugar, vanillin sugar, salt and flavour until frothy. Stir in eggs one by one. Mix flour and baking powder and stir in briefly alternating with the cream. Fold in whole nuts, marzipan and nougat
Spread into a greased, breadcrumbed springform pan with a tube bottom insert (26 cm Ø). In a preheated oven (electric cooker: 175 °C / circulating air: 150 °C / gas: level 2) approx
Bake for an hour. Cover after approx. 45 minutes if necessary. Leave to cool in the tin. Then turn out and let it cool down
Roast the hazelnut leaves in a pan without fat. Heat jam and pass through a sieve. Spread the top of the cake with the jam. Sprinkle with hazelnut leaves and dust with icing sugar