Plot: Everyone loves cookies, but it's not easy to make cookies at home that taste and look as good as a bakery-made cookies. Recipes: Thick and Chewy Chocolate Chip Cookies, Big, Super-Nutty Peanut Butter Cookies, Big Chewy Oatmeal-Raisin Cookies Tasting Lab: Unorthodox Chocolate Chips Science Desk: How Baking Soda Works