morning chaps. go and look in your cupboards for a tin of condensed ( not evaporated ) milk. fill a large pan with boiling water and put it on heat. place the unopened tin of condensed milk in the pan for 1 and a half hours. IT WILL NOT EXPLODE, but keep the tin fully immersed in water at all times. let it cool down for half an hour and then put in the fridge for an hour before opening. you will not be disappointed. it would be good if people didn't spoil the surprise for the unenlightened.