Make a batter (springform pan) from the ingredients including the milk and bake at 175-195 ° C for 20-25 minutes. Put the sour cream on the cooled base, then distribute the drained mandarins on the sour cream. Whip the cream with vanilla sugar and cream stiffener and stir the powdered drink into the cream. Place on the mandarins and then grate the Rittersport chocolate and sprinkle on the cream.