When Arthur Karp shared his grandmothers favorite chocolate chip cookie recipe with Michael Coles, the business partners knew they had a hit on their hands. They opened their first Great American Cookies store in 1977 in The Perimeter Mall in Atlanta, Georgia. Now with more than 350 stores in the chain, these cookies have quickly become a favorite, just begging to be cloned. The chain bakes the cookies in convection ovens at the low temperature of 280 degrees for around 16 to 17 minutes. But since most of us don't have convection ovens and may have a hard time getting the oven temperature to this odd setting, I have made some adjustments. Just be sure, when you remove the cookies from the oven, that they appear undercooked and only slightly browned around the edges. This will give the cookies the perfect chewy texture when they cool.