Halve 8-9 sponge fingers crosswise and place them with the sugar side facing outwards on the edge of the springform pan (20 cm Ø). Line the bottom with sponge cakes as well. For the cream, soak gelatine in cold water. Mix mascarpone and sugar with the whisk of the hand mixer. Stir in sour cream and raspberry brandy. Squeeze the gelatine, dissolve lukewarm and mix with 5 tablespoons of the cream. Then stir into the mascarpone cream.
Coarsely chop 25 g chocolate and fold into the cream. Pour the cream into the mould lined with ladyfingers and chill for at least 3 hours. Melt 50 g chocolate in a bowl on a warm water bath and spread it thinly on a marble board. Chill for about 10 minutes, scraping with a pallet of shavings. Chill the shavings again. Decorate Charlotte with raspberries and chocolate shavings