A true pasilla is the dried form of the long and narrow chilaca pepper. In its fresh form this Chile is called a Chilaca. It's generally 6 to 8 inches long and 1 to 1½ inches in diameter. The rich-flavored, medium-hot pasilla is a blackish-brown color, which is why it's also called Chile negro. This Chile is sold whole, and powdered. It's particularly good for use in sauces. They are wrinkled dried chiles with a rich, spicy flavor with hints of fruit. These dried chilaca chiles are also known as "chiles negros." They have a rich hot flavor and are generally ground and used for sauces.