It's definitely worth a shot! I think Vanilla from Tahiti (www.vanillafromtahiti.com) has corn-free vanilla. I think you can only order it online.
Originally Posted by xekomaya
How do you feel about the texture of your flour mix? Right now I'm
Hain makes corn-free baking powder if you want to simplify - I've ruined waaaay too many things with too much baking soda. And I would add even more than the recipe since flax goo is heavier. Gelatin + tapioca + baking powder might replace the eggs better.
I assume you want these fairly soon or I would suggest you just make your own vanilla. You could perhaps just whiz up a vanilla bean (or just add the seeds) instead of extract. That might even be better since it is a pretty butter intensive recipe and palm shortening doesn't really taste like butter, you need to replace some flavor somehow.
It is going to be pretty hard since you'll be adding flavorless things (palm & egg replacer) for the main flavors in the cookie, but I'm sure you can come up with something fairly similar.