Cocoa smells like a mix of earthy, chocolatey, and sometimes a fresh, grassy vibe, especially high-quality stuff. It’s comforting and rich, kind of like the inside of a fancy chocolate shop, or when you first open a bag of good chocolate chips for late-night baking. Cocoa smells like that rich, dark flavor of a chocolate protein shake, or maybe the scent that hits you when you open a fresh bag of coffee beans that also has hints of chocolate.