At the end of thirty minutes or when they seem to be crispy but not burnt, remove the cookie sheets to the counter and let sit for 5 minutes. When set, use a long spatula to move the entire cookie to a cooling rack. Cool for 15 minutes before slicing. (this timing is pretty crucial…slice too early and they are mushy…slice too late and they crumble…soooooo use a timer set for 15 minutes to be exact!