A chocolate sandwich cookie consists of two crisp, cocoa-flavored biscuits surrounding a sweet, creamy filling. It has a rich chocolate taste, a crunchy texture when whole, and a soft, crumbly texture when crushed or dipped. Around the world, it is commonly crumbled into pie crusts, layered into ice-cream desserts, or blended into milkshakes and other sweets. Popularized in the United States in the early 20th century, it has since become a familiar treat and dessert ingredient in many countries.