An Oreo is a sandwich cookie consisting of two usually chocolate wafers with a sweet crème filling. Introduced in 1912, Oreo is the best selling cookie brand in the United States. As of 2018, the version sold in the U.S. is made by the Nabisco division of Mondelez International.
During the cutaway montage of Peter training Chris to be a man in "Fore Father", he teaches him the proper way to eat an Oreo: by twisting it, pulling it apart and licking it. Chris attempts to do as instructed, but slaps himself in the face with the cookie and falls onto the ground.
In "The Cleveland-Loretta Quagmire", Bruce holds a CPR class at the Quahog Community Center, offering Oreos following the conclusion of the class.