Cocoa Puffs is a bran of chocolate-flavored puffed grain breakfast cereal manufactured by General Mills . They are small "puff" spheres that have been flavored with chocolate. Essentially, General Mills took their popular Kix cereal and added chocolate flavoring to it. Kix cereal is produced at the same factories as Cocoa Puffs, but differs in both density and circumference. Its mascot is Sonny the Cuckoo Bird, whose catchphrase is "cuckoo for Cocoa Puffs". Sonny was originally dark brown but has since become orange. He wore a striped pink and white shirt, but this has been removed since 1993.