Triple sec is an orange-flavored liqueur that is clear, dry, and strongly flavored. It is made from unripened orange peels that are steeped in a base spirit derived from sugar beets. Triple sec has a straightforward, strong citrus flavor. It is usually made from a spirit derived from sugar beet in which orange peel is steeped, and the oranges are harvested when their skin is still green and they have not fully ripened, so the essential oils remain in the skin rather than the flesh of the fruit. This process creates a spirit that has a very strong and distinct orange flavor. Triple sec is rarely consumed neat, but is used in preparing many mixed drinks such as margaritas, cosmopolitans, sidecars, Long Island iced teas, and mai tais.
In summary, triple sec has a strong citrus flavor and is used as an ingredient in many mixed drinks.