Variation in chocolate chip cookies
Chapter 2 endnote 17, from Lisa Feldman Barrett.
Some context is:
Even within a more fine-grained category like “Chocolate Chip Cookie,” there is still diversity created by the type of chocolate, the amount of flour, the ratio of brown sugar to white sugar, the fat content of the butter, and the time spent chilling the dough.
Visit The Ultimate Guide to Chocolate Chip Cookies for some revealing examples.