These cookies test the limit of exactly how much chocolate you can possibly pack into one cookie. Made with cocoa powder and more than one type of chocolate chip, this cookie's soft dough benefits from at least 4 hours of refrigeration, allowing the disks to stay thick and chewy when cooked. Plus, the dough will keep frozen for several months, so stash a few in the freezer to throw in the oven whenever you're hit with a craving for chocolate. Test Kitchen Director Farideh Sadeghin developed this recipe based off New York City's famous Levain Bakery. Get the recipe for Chocolate Chocolate Chip Cookies »