key lime juice

Key lime juice is the freshly extracted liquid from key limes (Citrus aurantifolia), small citrus fruits native to Southeast Asia but historically cultivated in the Florida Keys. The juice is distinctly yellow-green in color and possesses a more intense, slightly floral acidity compared to Persian lime juice, with subtle complexity and a subtle bitterness. Key limes are smaller and rounder than their Persian lime cousins, with higher juice yield and greater aromatic intensity. The juice's particular chemical composition—higher in citric acid and aromatic compounds—makes it a preferred ingredient in certain classic preparations, particularly Key lime pie.

Key lime juice is essential to Caribbean, Central American, and American coastal cuisines, most famously in Key lime pie, a dessert of condensed milk and egg yolks set with the juice's acidity. The juice serves as a souring agent in cocktails such as daiquiris and margaritas, marinade bases for ceviche, and brightening finishes in seafood dishes. Its distinctive flavor profile makes it particularly suited to pairing with coconut, tropical fruits, and rich or fatty proteins. The juice's acidity is also employed in Latin American dishes like picadillo and Cuban mojo marinades.