This makes a thick, delicious paste that coats the chicken with tons of flavor. I like to make more than one batch at a time, apportioned into quart-sized ziplocs containing enough marinade for two chicken breasts. I freeze my chicken in the same bag with the marinade; the night before I intend to grill, I put the whole bag in the fridge and let it defrost / marinade overnight and all through the next day. I like to serve some fresh, homemade pico de gallo on top.
Note: When I open a new can of chipotles, I always freeze them individually with the adobo sauce split evenly among each "batch." Therefore, I'm not positive about the amount of adobo sauce I add, but the 1 tablespoon listed below is a decent approximation!