Coarsely chop the chocolate and walnuts separately. Melt the butter in a pot at low heat. Add 125 g chocolate, salt and brown sugar and melt in it over low heat while stirring. Remove from the heat, place in a mixing bowl and allow to cool. Stir in the eggs one by one. Stir in sour cream. Mix 1 packet of vanilla sugar, flour and baking soda, add and stir in. fold in nuts and 125 g chocolate
Put it into a greased springform pan (26 cm Ø) sprinkled with flour and smooth it down. Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for approx. 25 minutes. Remove, place on a cake rack, remove from the edge of the springform pan and let cool in the springform pan
Heat red wine, cloves and sugar in a pot, simmer for about 5 minutes. Remove the cloves. Mix starch with a little water and thicken the simmering stock. Add cherries without defrosting, bring to the boil again briefly, stir in allspice and cinnamon. Pour the mulled wine cherries into a bowl, let them cool down
Mix 2 sachets of vanillin sugar and cream thickener. Whip the cream with the whisk of the hand mixer until stiff, allowing the vanillin-sugar mixture to trickle in
Remove the base from the springform pan, place on a cake plate and spread the cream evenly, leaving some space for the edge. Spread the mulled wine cherries on top