Oreo (/ˈɔːrioʊ/) is an American sandwich cookie consisting of two (usually chocolate) wafers with a sweet crème filling. Introduced on March 6, 1912, Oreo is the best selling cookie brand in the United States.[3] As of 2018, the version sold in the U.S. is made by the Nabisco division of Mondelez International. Oreo cookies are available in over one hundred countries.[2] Many varieties of Oreo cookies have been produced, and limited-edition runs have become popular in the 21st century.