Set oven to 250ºF and get a roasting pan ready. If you have a rack that fits into the roasting pan, put that in there, too. Get a piece of foil cut to cover the pan if you don’t have a lid.
Combine the rub ingredients and rub the mixture into the rack of ribs, getting all sides including the bones.
Place meat-side-up on the rack and cover tightly.
Roast for 4 hours. No peeking!
Ribs are done when the meat is very tender and the bones have just begun to release from the meat.
Uncover and pop the pan under the broiler for just a minute to brown them a little.