Oreo is a popular sandwich cookie brand produced by Nabisco, a subsidiary of Mondelez International. It features two chocolate-flavored wafers with a sweet cream filling in between, creating an iconic sandwich structure. Key features include the "Twist, Lick, Dunk" phrase, which suggests enjoying the cookies by twisting them apart. Oreo has expanded its product line to include various flavors and limited-edition releases, and is a cultural icon used in desserts and recipes worldwide.