Note: Do not spill cocoa powder if you can help it. Trying to clean it up is like chasing mercury around the bathroom floor with a dust pan when you break a thermometer, the various states of matter fighting you at every turn. Cocoa is pernicious. It's powder, but it's also smeary and staining, not quite a solid, and has a density like osmium. It's both hard to collect and too easy to disperse at the same time. Like anthrax! Only yummy.