Cooking A Slab Of Ribs In The Oven. Place ribs directly on cooking rack. Insert an instant-read thermometer into the thickest part of the ribs and remove from the oven once it reads 180-195F see note.
Cook baby back ribs for about 2 hours spareribs for about 3 hours or country-style ribs for about 3 12 hours until the pork is soft and tender. Put the ribs in the middle of the oven where they steam in their own juices and the evaporating water or broth since theyre covered. Bake for 30 minutes more before starting to check doneness.
Cover the ribs tightly with aluminum foil and place them back in the oven.
Because spare ribs tend to be tougher than baby back ribs and beef ribs tougher than pork a slower lower heat is ideal for beef spare ribs. In this case the magic numbers are. Bake ribs for 8 hours without opening door. Because spare ribs tend to be tougher than baby back ribs and beef ribs tougher than pork a slower lower heat is ideal for beef spare ribs.