Update

Just wanted to clarify something. On the site where I was reading about using plain yogurt in baking she said she substitutes yogurt for butter. She mentioned she has done this with some muffins and coffee cake recipes. I'm having my doubts about using it in cookies and the such. Just thought I'd mention that before someone totally destroys a good batch of chocolate chip cookies. :) However, if you do try this and it works please let me know!