how long to cook back ribs
1 If you are using small baby back ribs, take out after 3.5 hours. 2  If you are using regular baby back or St. Louis style ribs, then take out after 4 hours. 3  Drain off the drippings. 4  Flip the ribs over using two spatulas (and an extra set of hands if you have them) so the meat side is up.