Grease baking tray (approx. 35 x 40 cm) and dust with flour. Grate half of the chocolate finely, chop the rest roughly. Separate eggs
Cream fat, sugar, 2 vanilla sugars and 1 pinch of salt. Stir in the egg yolks one by one. Mix grated chocolate, ground nuts and baking powder and stir in briefly, alternating with the rum. Beat the egg white in two portions with 1 pinch of salt each until stiff. Stir 1/4 beaten egg white into the dough, fold in the rest in portions
Spread the dough on the tray. Bake in the preheated oven (electric cooker: 175 °C/circulating air: 150 °C/gas: level 2) for approx. 30 minutes. Let them cool down
Roast the hazelnut flakes without fat and let them cool down. Spread 1 glass of cranberries on the nut base. Whip the cream in 2 portions until stiff, adding cream firming agent and 2 vanilla sugars. Spread on the cranberries. Cut the cake into pieces. Sprinkle with chopped chocolate and nut flakes. Decorate with the remaining cranberries just before serving