Which liqueur is commonly used in a margarita?

The commonly used liqueur in a margarita is Triple sec. This is an orange-flavored liqueur that provides the signature sweetness and citrus flavor profile that balances the tartness of lime juice and the potency of tequila. Triple sec is essential for achieving the classic margarita taste, contributing body and depth to the drink.

In making a margarita, the combination of tequila, lime juice, and Triple sec is fundamental, as it marries the flavors seamlessly. Other liqueurs, such as sweet vermouth, amaretto, and peach schnapps, are not traditional components of a margarita and do not complement its flavor profile in the same way. Sweet vermouth tends to be used in cocktails like Manhattans, while amaretto is known for its almond flavor that pairs well with sweeter drinks. Peach schnapps is fruity but does not offer the necessary orange citrus flavor that is crucial for a margarita.