Triple sec is a French term for clear, orange-flavored liqueurs. They are traditionally distilled from a macerate of dried orange peels and a neutral spirit. The origin of triple sec is undoubtedly French, though it is disputed who was the first to use and market the term, as well as the true meaning of the name triple sec, which translates as triple dry.
Combier distillery from Saumur claims that their triple sec is the earliest version, first made in 1834, though some name Cointreau as the original producer. Regardless, the two companies are still the biggest competitors and the most important triple sec brands.
High-quality triple sec liqueurs will have a potent orange flavor as well as aromas of bitter oranges and orange blossom. They range from 20 to 40% ABV, though better quality versions tend to have higher alcohol content, which usually goes from 38 to 42%.