. . . Cream of Tartar!!!
I've spent years trying out different chocolate chip cookie recipes hoping to find the one that gives me a cookie that is crunchy on the outside and chewy on the inside. Today I think I finally found the recipe that gives me exactly that! I found it at All Recipes.com, Best Chocolate Chip Cookies. I also learned that adding 1/2 teaspoon of Cream of Tartar gives the cookies a cracked look - not a cakey look.