My Little Pony: Friendship is Magic - Image #280,596

I say it was the chocolate moose!

New Spoilers!

@Baluh
That's what I've said ever since that thing popped up in a screenshot a few weeks ago.
I will laugh so hard if that ends up being true in any way!
(More realistically, I'm guessing it will be Pinkie herself who ate the cake, but we'll see where they take it.)