Lime curd is a thick, creamy spread or filling made from the juice and zest of limes, eggs, sugar, and butter. It is a member of the broader 'curd' family of fruit-based spreads, which also includes lemon curd, orange curd, and other citrus curds.
Lime curd follows the pattern set by lemon curd, which emerged in Victorian England as a popular accompaniment to scones, crumpets, and other baked goods; lime and other citrus curds are later variations on that tradition. Lime curd's tart, tangy flavor and silky smooth texture made it a natural complement to the richness of clotted cream and other dairy products commonly served with British afternoon tea.
In culinary applications, lime curd is most often used as a filling for cakes, tarts, and pastries, where its bright, acidic notes help balance richer flavors. It can also be served as a spread on toast, scones, or crackers, or used as a topping for desserts like pavlova or cheesecake. Some recipes call for folding lime curd into whipped cream or yogurt to create a light, airy dessert mousse.
Culturally, lime curd is strongly associated with British and Commonwealth cuisines, though it has gained popularity worldwide as a versatile ingredient. In the Caribbean, where limes are abundant, lime curd is sometimes used as a filling for traditional pastries and tarts. In Southeast Asian countries like Thailand and Vietnam, it may be incorporated into custard-based desserts or used to flavor ice creams and sorbets.
Variations on traditional lime curd can include the addition of other citrus fruits, such as lemon or grapefruit, or the use of alternative sweeteners like honey or maple syrup. Some recipes also call for the inclusion of spices like ginger or cardamom to complement the lime flavor.
To prepare lime curd, the key ingredients - lime juice, zest, eggs, sugar, and butter - are combined and cooked over gentle heat until thickened to a smooth, spreadable consistency. The process requires careful attention to prevent the eggs from curdling. Once cooled, lime curd can be stored in the refrigerator for up to one week, or frozen for longer-term use.