Grease the cake pan (24 cm Ø; approx. 3 l capacity) and dust with flour. Grate the whole chocolate very finely.
Cream fat, sugar, vanillin sugar and 1 pinch of salt. Stir in the eggs one by one. Mix flour, nuts, baking powder and chocolate, alternating with cream and rum. Spread into the mould.
Bake in a preheated oven (electric cooker: 175°C/circulating air: 150°C/gas: level 2) for approx. 1 hour (cover after approx. 50 minutes if necessary).
4 Let the cake cool in the mould for about 10 minutes. Then turn it over and let it cool down completely. Dust with icing sugar. Serve with whipped cream and stewed cherries.