Oreo Cookies are delicious snacks of two chocolate wafers with cream in the middle. They have been a popular snack in America for over a hundred years, in fact they are the country’s best selling cookie. The cookies were created by Nabisco in their Manhattan factory in the early 1900s. They were introduced to the market on March 6, 1912. These days oreos are sold in many different varieties in many countries around the world. We celebrate Oreo Cookie Day on their birthday every year on March 6th.