Grate 200 g chocolate finely. Cream butter, 160 g sugar and vanilla sugar with the whisk of the hand mixer. Stir in the eggs one by one. Stir in rum or brandy. First fold in nuts, then chocolate with a dough scraper. Grease a springform pan (26 cm Ø). Fill in the dough and smooth it down. Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: see manufacturer) for about 1 hour. Take out, remove the edge of the dough from the tin and let it cool down on a cake rack
Coarsely chop 100 g chocolate and melt over a warm water bath. Using an angle palette, spread evenly on the back of a baking tray and allow to set
Remove the cake from the mould. Mix cream thickener and 2 teaspoons sugar. Whip the cream in 2 portions until stiff, pouring half of the cream mixture into each portion. Spread the cream all around the cake, forming hollows in the surface with a spoon. Spread the advocaat on the cake
Use a spatula to grind the chocolate into small rolls. Spread the rolls over the cake. Lift the cake onto a cake plate
waiting time approx. 1 1/2 hours