First boil 1cup milk add sugar according to taste when boil add chocolate cistard and cook.now also make corn flour custard.when custard cool down.now prepare jelly separately.now crushed biscuits and prepare base.and mix gelatin powder in hot water, now mix gelatin powder in custar mixture and also mix cream in two mixtures.now pour custard in mold let it set and pour jelly mixture put in fridge.now again add custar after 10mint again pour jelly and oreo biscuit on c.custard and after 8hrs serv