Stir 125 ml milk, pudding powder, espresso powder and sugar until smooth. Bring 375 ml milk to the boil in a saucepan. Remove the pot from the hotplate, stir in the custard powder and place back on the hotplate. Let the pudding boil while stirring for at least 1 minute. Put the pudding into a mixing bowl, cover the surface with foil and let it cool down for about 2 hours
Halve 11 lady fingers and set aside. Put 1/2 and 15 lady fingers in a freezer bag and crumble them with a rolling pin. Melt butter and mix with the crumbs. Coat a plate with oil. Press the crumb mixture on it to a cake base (19 cm Ø). Place a cake ring around the cake base so that approx. 2 cm remain free between the base and the cake ring. Place the shortened sponge fingers on the cake ring with the sugar layer facing outwards. Chill for about 30 minutes.
Soak gelatine in cold water. Whip 400 g cream and vanillin sugar until stiff. Squeeze the gelatine, dissolve and stir in approx. 1 tbsp. of whipped cream. Then stir into the remaining cream. Stir the cold pudding briefly with the whisks of the hand mixer. Fold in 2 portions of cream. Pour espresso cream on the base and smooth it down. Chill for approx. 4 hours
Peel curls from the chocolate with a peeler. Whip 100 g of cream until stiff and fill into a piping bag with punched spout. Remove the cake from the springform pan and arrange on a cake platter. Spray 12 cream tuffs onto the cake and chill until serving. Dust the cream tuffs with cocoa and decorate the middle with chocolate curls
Waiting time approx. 5 hours