I'm having a birthday party for my DS and one of his friends has a nut and sesame allergy. I was going to buy a chocolate cake from the supermarket - I would usually make one but don't have time this year - but none of them are suitable for nut allergy sufferers. Does anyone have any recommendations - maybe I can order one online but would rather go to the shop? Just a bit terrified of getting the wrong cake and want this boy to be able to eat with the others!