Look for chipotle chiles canned in adobo sauce in the grocery store's Mexican foods aisle. Chipotle chiles and adobo sauce each add distinctive smoky flavor and heat to recipes.
To freeze leftover chipotle chilies and sauce for a later use, first chop the chiles and mix them with the adobo sauce. Spoon 1-tablespoon quantities onto a waxed paper-lined cookie sheet; freeze until firm. Transfer the frozen chiles-and-adobo portions to a food storage freezer bag and freeze up to one month.