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Frijoles negros (literally "black beans" in Spanish) is a Hispanic dish made with black beans, prepared in Cuba, Venezuela (where it is called caraotas negras), Puerto Rico, Mexico, and other nations in Latin America. The black bean, a legume of the species Phaseolus vulgaris, is usually purchased in either canned or dried form. One cup of dried black beans yields approximately 2 1⁄2 cups of cooked beans. Black bean soup (sopa de frijoles negros) is another commonly prepared Cuban favorite.
Black beans are high in folate (256 mcg), iron (3.61 mg), magnesium (120 mg), and phosphorus (241 mg); they are also a source of zinc (1.92 mg), niacin (2 mg), and thiamine (0.42 mg)—based on 1 cup portion size.