Oreo is a popular sandwich cookie consisting of two chocolate wafer cookies with a sweet cream filling in between. It was first introduced by the Nabisco company in 1912 and has since become one of the best-selling cookies in the world. The distinctive black-and-white appearance and unique flavor have made it a favorite among many. Over the years, Oreo has expanded its product line to include various flavors and limited-edition releases, such as Red Velvet and Birthday Cake. The cookie is often enjoyed on its own, but many people also like to dunk it in milk or use it as an ingredient in desserts like ice cream and cheesecake.