Cosmo is a male toon with a Swiss roll for a head with white frosting drizzle on top of his head with lime green, cyan, and purple star sprinkles on his cheeks wearing a white sleeveless hoodie and long socks that are the same colors as the sprinkles on his cheeks. He is 23 years old and is the co-owner of the a bakery in Fresno with his best friend from high school Sprout. Cosmo is good at baking, but is shy and reserved. For some odd reason, people like to think that Sprout and Cosmo are actually dating, calling their ship "Fruitcake", but that is not the case. They're just guy best friends who act more like Mordecai and Rigby from Regular Show.