What is Cointreau?

Cointreau is a brand of triple sec produced in Angers: a clear orange liqueur made by macerating and distilling dried sweet and bitter orange peels with neutral spirit, then sweetening. It is bottled at 40% ABV. Triple sec is the category; Cointreau is a specific, relatively dry, full-strength example of that category.

It is not Grand Marnier. Grand Marnier is cognac blended with orange distillate. Inexpensive triple secs at 15–20% ABV occupy the same recipe line but contribute more sugar and water than peel and proof. In a Margarita, Sidecar, or Cosmopolitan written for a 40% orange liqueur, that difference is structural.

Bright orange-peel oil, clean alcohol, and less syrup than inexpensive triple sec. The impression is citrus zest rather than orange candy, with a dry finish for a liqueur.

Grand Marnier, by contrast, tastes of marmalade, vanilla, and cognac oak. The two share orange and 40% ABV; they do not share a base spirit or a texture.

The Cointreau distillery was founded in Angers in 1849 by Adolphe and Édouard-Jean Cointreau. Édouard Cointreau created the current-style orange liqueur in 1875, originally sold as Cointreau Triple Sec. Combier in Saumur claims an earlier triple sec, dated 1834 in the firm’s account; the two houses define the French dry-orange style.

The Sidecar (cognac, orange liqueur, lemon) and the Margarita (tequila, orange liqueur, lime) both depend on a dry, high-proof orange liqueur to bridge spirit and citrus. When the orange component is a low-alcohol cordial, the drink loses both strength and peel character.

Use Cointreau in sours that specify orange liqueur. A common Margarita is two parts tequila, one part Cointreau, and one part lime (or a slightly tighter 2:0.75:0.75). The Sidecar is the same architecture with cognac and lemon. The Cosmopolitan is vodka, Cointreau, lime, and cranberry. A well-made 40% triple sec or dry curaçao is the closest substitute; Grand Marnier will make the drink heavier and more cognac-like.

The bottle is shelf-stable. Store it as you would a spirit, tightly capped and away from heat. Orange oils fade slowly after opening; there is no refrigeration requirement comparable to vermouth.