Chewy Chocolate Cookies, from the Jan/Feb 09 issue of Cooks Illustrated.
I used agave sweetener instead of corn syrup, as I always do now (thank you TJ!). I also used turbinado sugar instead of brown sugar. I weighed the dry ingredients, creamed the hell out of the sugars and butter, and discovered I had only 1/5 cup agave instead of 1/2. Unexpected grocery run!
I used three squares of semisweet baking chocolate (which was so old the fat had bloomed on the surface. I'd never seen bloom before, but it doesn't affect the taste.) and a few tablespoons of chocolate chips (whatall was left in the package). It wouldn't hurt to chill them a bit longer, but they shaped all right even mostly warm. They are delicious, although I don't think the texture is quite what CI had in mind--the turbinado is quite different from regular brown sugar in terms of moisture content. I am most concerned that my food tastes good; whether it resembles some ideal is not my affair.
These were made to go with my "Come to the dark side, we have cookies... --V" shirt.