Grand Marnier is a luxurious French liqueur made from a blend of Cognac brandy, distilled essence of bitter orange, and sugar. It is commonly used in cocktails to add depth with its complex orange flavor. Grand Marnier is versatile in mixology, often featured in sophisticated drinks like the Margarita or the Cosmopolitan to enhance the citrus notes. It can also be used as a flavorful addition to dessert cocktails, where its rich, woody undertones complement sweet and creamy elements.