Honestly, I think the Big Bird cake missed the mark. The eye placement was really awful. Yes, he did amazing work on the body of the character, but the face was just off. Also, the scene itself was a little "meh". I happen to agree that using a non-show muppet jumping out of the cake was odd when you have hundreds of characters, and frankly Jellybean isn't the most creative muppet name. Also Prairie was nice, but the missing eye lash, to me, should have been more of a hit. Overall the cake he made just didn't look good enough to win, though it was impressive.
As much as I'd hate to say it, I think the Elmo cake should have won. First of all, it had a really nice scene. Parody of popular shows has been part of sesame street since day one, and so have whatnots, or in this case Anything muppets. Also I think the Anything muppets looked fantastic, as if designed by Jim Henson himself. I think the coloring was perfect, the shape was spot on, and most important the eye placement was perfect on all the characters. Let's not forget the cake within a cake that 3 out of 4 contestants tried to do. The one on the Elmo cake was the best and could have won by itself. Combined with the fact the assistant was literally working with one hand behind her back I don't get why the Elmo cake didn't win.
The Oscar cake was really poorly done and the guy doing it was way over confident. And really, how do you not try to include Slimey in that cake? It just seemed like the person doing it didn't really get Oscar at all. It was really a bland scene and the character work was pretty bad as well.
The Cookie Monster cake, to me, should have been second place to Elmo. It was a good scene, iconic, and felt like something that would have happened on Sesame Street. The muppet food, again, is iconic.