Sprinkle biscuits with liqueur. Leave to stand for approx. 10 minutes, turning 1-2 times. Soak gelatine in cold water
Whip the cream until stiff, chill. Mix mascarpone, yoghurt, sugar and vanillin sugar. Squeeze the gelatine, dissolve over low heat. First stir in 2 tablespoons of cream, then stir into the rest of the cream. fold in cream immediately
Place the springform pan rim (26 cm Ø) on a cake plate. Spread about half of the sponge cake close together as a cake base. Spread 1/3 cream on top. Spread half of the remaining sponge cakes on top. Spread 1/3 of the cream on top and spread the rest of the sponge cake on top. Spread the rest of the cream on top in a wavy pattern. Chill for at least 5 hours, preferably overnight
Carve peaches crosswise, blanch with boiling water, rinse and peel the skin. Cut peaches in half, stone and cut into thick slices. Sort the raspberries, wash and drain if necessary
Carefully remove the cake from the edge of the springform pan with a knife and remove the edge of the pan. Decorate the Malakoff cake with peach wedges, raspberries and mint