To make puréed chipotles, blend the entire contents of a 12-ounce (340 g) can of chipotles in adobo sauce in a blender. It'll make much more than you need, but that's a good thing!  Stash the extra in a jar in the fridge for up to 3 weeks or in the freezer until the next time you're craving these smoky grilled tacos or any other recipe that calls for chipotle en adobo, such as smoked pork tenderloin, vegetarian chili, or a dipping sauce for carrot fries.