This is a Cook's Illustrated recipe that was originally published in January 2009. These are dark, almost fudgy cookies that are not crumbly at all. They develop a nice, crackly top and are not overly sweet, even with the granulated sugar coating. CI recommends using Callebaut Intense Dark L-60-40NV, but any high- quality dark, bittersweet, or semisweet chocolate will work. Light brown sugar can be substituted for the dark, as can light corn syrup for the dark, but with some sacrifice in flavor. A spring-loaded ice cream scoop (size #30) can be used to portion the dough.