I had a quiet word with my dealer local baker and he turned up trumps with some high grade cannabis oat bran. I've whizzed it to a fine powder in one of those mini choppers that Delia recommends, and concealed mixed it into an old family recipe for fairy cakes.
I've made loads, so there's plenty to go round. The special ingredient has made them levitate rise quite well, but I think a maximum of 2 each would be advised. We don't want anyone getting too high consuming too many calories.
If it's good enough for Delia......
Peace. 