"What makes snickerdoodles so, well, snickerdoodley? Its distinctive crackling and cinnamon-sugar topping make it a standout cookie treat. Don’t forget to include cream of tartar on your grocery shopping list when you’re planning to bake snickerdoodle cookies. Along with baking soda, it’s the secret to the cookie’s leavening. Some home cooks swear that hand mixing the snickerdoodles, instead of using an electric beater, creates a better cookie...."