"Cookies, when you make small changes to ingredients, we find that you get some pretty massive differences," Souza told Morning Edition's A Martinez. So, it's kind of a fun one to use as a litmus test ...

When the craving for a really good cookie strikes, nothing else will do. Sure, things like three-ingredient, no-bake cheesecake, butter pecan ice cream, or frozen yogurt feel fancier and more ...