"Cocoa powder is the sort of ingredient usually seen in dessert recipes, but unsweetened cocoa powder adds a deep flavor to meats when used as part of a spice rub. For this pork recipe, mix together chili powder, cocoa powder, brown sugar, cumin, pepper, and a bit of cinnamon and coat pork tenderloins all over with it. For the best flavor, let them sit overnight, but you can also grill them right away. Serve with a Tangy Cabbage Slaw for an easy and light outdoor dinner. Game plan: After 30 minutes, the spice-rubbed tenderloins are ready to be grilled, but for more developed flavor and juicier meat, let them sit for up to 24 hours...."