Chocolate Chili Cookies
Baking ingredients all have their own personality. Some of them are over-sensitive, hardening and becoming unusable at slightest hint of oxygen (I’m looking at you, brown sugar). Some of them have a way of hiding in your cabinet and only appearing after you’ve bought a replacement (that would be molasses, as discussed here, and, oddly, Karo syrup). And others fall into the general category of “You Will Only Ever Have To Buy This Once Because It Is A Magical Never Ending Container” (obviously, this is baking powder and baking soda).