Pasilla peppers are dried forms of the chilaca peppers and are a type of chili pepper commonly used in Mexican cuisine. They have a medium heat, compared to comparable chile peppers, and a complex flavor profile that ranges from slightly fruity to smoky. Pasilla peppers can add depth, complexity, and a touch of heat to a wide range of recipes including stews, sauces, and salsas.
The term “pasilla” can be confusing because it is also can be used to describe “ancho” chile peppers, which are dried poblano peppers. Be careful not to confuse the two because it will drastically alter your recipe.
Pasilla peppers may not be the easiest to find in your local big box chain supermarket, but given their popularity within and outside of Mexican cuisine, they can be found in many specialty food stores, markets, and online. The latter is especially easy to use, for dried peppers are easy to ship and obviously have a long shelf life. If looking toward Amazon, I’d recommend these.