Mayor McCheese represented a giant talking cheeseburger in McDonaldland.
Mayor McCheese was designed with a cheeseburger-shaped head, a face, and a mayoral sash, making the character an immediate visual link between McDonald's food and its fictional advertising world. He appeared in commercials and promotional material alongside Ronald McDonald and other McDonaldland characters.
The character was part of McDonald's effort to build a shared setting around its mascots. Instead of presenting food products in isolation, the campaigns placed them inside a colorful world with recurring personalities and locations.
Mayor McCheese is sometimes confused with Officer Big Mac because both characters had food-inspired designs and appeared in the same universe. Officer Big Mac had a Big Mac-shaped head and a police role, while Mayor McCheese had the cheeseburger head and civic-leader role.