Orange-flavored liqueur is a popular alcoholic beverage that is used in various cocktails and desserts. While most people are familiar with the original brand, Cointreau, there are other synonyms for orange-flavored liqueur that can be used interchangeably. Triple sec is a sweet and colorless liqueur made from the dried peels of bitter and sweet oranges. Grand Marnier is a brandy-based orange liqueur that has a slightly bitter taste and is often used in cooking. Curacao is a bright blue liqueur made from the dried peels of bitter oranges and is commonly used in tiki-style cocktails. Lastly, Mandarine Napoleon is a Belgian orange liqueur that is made from mandarin oranges and has a sweet and fruity flavor.