From, The Totally Cookies Cookbook. The original recipie doesn't call for cornstarch. I read somewhere, that for a chewier texture, you need to add cornstarch, so I always add 1 tsp cornstarch to this recipe, and I never have leftovers. It's great to have on hand especially during the holiday season or special occassions. Keep a log in the fridge or freezer, and make a few at a time in your toaster oven. Yum! Preparation and cooking times will vary depending on how many batches your oven will fit. I always double the recipe because they go so quickly.