The pasilla chile ( pah-SEE-yuh) or chile negro is the dried form of the chilaca chili pepper, a long and narrow member of the species Capsicum annuum. Named for its dark, wrinkled skin (literally "little raisin"), it is a mild to hot, rich-flavored chile. As dried, it is generally 6 to 8 inches (15 to 20 cm) long and 1 to 1+1⁄2 inches (2.5 to 3.8 cm) in diameter. The fresh narrow chilaca can measure up to 9 inches (230 mm) long and often has a twisted shape, which is rarely apparent after drying. It turns from dark green to dark brown when fully mature. In the United States, producers and grocers sometimes incorrectly use "pasilla" to describe the poblano, a different, wider variety of pepper, the dried form of which is called an ancho if dried while green and a mulato if dried at maturity.

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