Chop the prunes finely and soak in 100 ml Madeira for at least 1 hour
Chopping chocolate. Cut butter into pieces. Melt the chocolate and butter in a wide pot at low heat
Beat the eggs, sugar and salt in a bowl with the whisk of the hand mixer for 3-4 minutes until creamy. Remove the chocolate and butter mixture from the heat and immediately pour into the egg mixture and stir in. Mix flour, cocoa and baking powder. Quickly fold the flour mixture and Madeira plums into the chocolate-egg mixture
Pour the dough into a greased fat pan of the oven (32 x 39 cm). Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: see manufacturer) for approx. 40 minutes. Take out and let cool on a cake rack
Cut the marzipan into small pieces. Bring the milk to the boil in a pot, add the marzipan and whisk until there are no more marzipan lumps. Stir in the liqueur, let it cool down and put it in a cool place for about 1 hour
Wash plums, halve, stone and cut into slices. Slice and simmer 75 ml Madeira in a pot for about 5 minutes. Mix starch with 1 tbsp. water and stir into the plums. Let simmer for about 1 minute while stirring. Remove from the heat and let it cool down
Soak gelatine in cold water. Beat the egg yolks and vanilla sugar until creamy with the whisk of the hand mixer. Whip the cream until stiff. Stir the egg yolk cream into the marzipan. Gradually fold in the cream. Squeeze the gelatine, dissolve and stir in 4 tbsp. of the marzipan cream, stir into the remaining marzipan cream. Spread the marzipan-cream on the brownie base and chill for at least 1 hour
Cut the cake into about 30 squares (approx. 6.5 x 6.5 cm) and serve with Madeira plums
waiting time 2 1/2 hours