Key lime juice is a highly acidic fruit extract, derived primarily from the small, green key limes, which are widely recognized for their unique aroma and tangy flavor. Known as Citrus aurantifolia, key limes are native to Southeast Asia but are now grown in numerous parts of the world, including Mexico, Florida, and the Caribbean. The juice is essential for various culinary applications, known for its sharp, floral notes that are more prominent compared to other lime varieties.
In home cooking, key lime juice is best used in a range of dishes such as desserts, marinades, and dressings. It is popularly used as a main ingredient for key lime pie, an American classic dessert with a creamy, tart filling. The juice also serves as a tenderizing agent for meats and enhances the flavor of seafood dishes, salsas, and sauces, giving them a kick of freshness and zestiness that elevates taste profiles.