Xanthan gum and guar gum can help give that cohesiveness that's usually given by wheat gluten, and can be bought in a powdered form - comes in bottles that look like big white plastic pill bottles with orange lables. Only problem - one or the other, and I can never remember which, disagrees with my stomach and gives me almost like a touch of the runs. So for someone like me, who's only very slightly gluten intolerant, it's not neccessarily better than eating something made of wheat. (Although seeing as the long run effect of eating wheat if you're gluten intollerant can include getting intestinal cancer, it MIGHT still be better.)