Josh,
Your guess is as good as mine
Honestly, I don't much care for spotted cheney anyway - I prefer the chocolate or syrup sponge puddings!
I would guess that there are many steamed puddings and presumably they all have something in common - maybe steaming was a good way to cook them in the past? Perhaps we should ask John if he can remember
Of course with microwaves now, I don't do much steaming ...
