The appearance of culantro and cilantro are different but the leaf aromas are similar, although culantro is more pungent. Because of this aroma similarity the leaves are used interchangeably in many food preparations and is the major reason for the misnaming of one herb for the other. While relatively new to American cuisine, culantro has long been used in the Far East, Latin America, and the Caribbean. In Asia, culantro is most popular in Thailand, Malaysia, and Singapore where it is commonly used with or in lieu of cilantro and topped over soups, noodle dishes, and curries. In Latin America, culantro is mostly associated with the cooking style of Puerto Rico, where recipes common to all Latin countries are enhanced with culantro. The most popular and ubiquitous example is salsa, a spicy sauce prepared from tomatoes, garlic, onion, lemon juice, with liberal amounts of chiles. These constituents are fried and simmered together, mixed to a smooth paste and spiced with fresh herbs including culantro. Salsa is usually consumed with tortilla chips as an appetizer. Equally popular is sofrito or recaito, the name given to the mixture of seasonings containing culantro and widely used in rice, stews, and soups (Wilson 1991). There are reportedly as many variations of the recipe as there are cooks in Puerto Rico but basically sofrito consists of garlic, onion, green pepper, small mild peppers, and both cilantro and culantro leaves. Ingredients are blended and can then be refrigerated for months. Sofrito is itself the major ingredient in a host of other recipes including eggplant pasta sauce, cilantro garlic butter, cilantro pesto, pineapple salsa, and gazpacho with herb yogurt.
Culantro is reported to be rich in calcium, iron, carotene, and riboflavin. Fresh leaves are 86–88% moisture, 3.3% protein, 0.6% fat, 6.5% carbohydrate, 1.7% ash, 0.06% phosphorus, and 0.02% iron. Leaves are an excellent source of vitamin A (10,460 I.U./100 g), B2 (60 mg %), B1 (0.8 mg %), and C (150–200 mg %) (Bautista et al. 1988). On a dry weight basis, leaves consist of 0.1–0.95% volatile oil, 27.7% crude fiber, 1.23% calcium, and 25 ppm boron.