In 1880s France, oranges were quite rare and exotic. When Louis Alexandre Marnier-Lopostolle traveled to the Caribbean in search of ingredients, he came back with bitter oranges to combine with his family’s fine cognac. Other orange-flavored liqueurs such as triple sec and curacao are mixed with a neutral alcohol base. Grand Marnier took it to the next level with a more complex flavor that makes it todays top-selling French liqueur.