Good to know! The science of baking cookies... Have you ever wondered why chocolate chip cookies can be chewy, crisp, soft, flat, thick, cakey, greasy, bland, flavorful, moist, or crumbly? Tessa shares how various ingredients and techniques can affect the taste, texture, and appearance of your chocolate chip cookies. This will hopefully help you understand how chocolate chip cookies work so you can make the PERFECT batch every time, whatever you consider to be perfect.