I recently ran across these recipes for making cat treats. I haven't made them myself, because my cat already loves the dog biscuits I make. But if she didn't, I would certainly give these a try. They are cheaper than buying commercially made treats and safer because you know exactly what is in them. You can even make them with organic ingredients.
Take a look at the links below for recipes. If you make them, please reply to this blog post, and let us know how they turned out!
http://www.petplace.com/article-printer-friendly.aspx?id=2919
http://www.petsadviser.com/pet-health/diy-cat-treat-recipes/