Doneness Cues for Your Baby Back Ribs
Bone Tips: When the ribs are close to being done, the meat will begin to retract, exposing the rib tips. U Shape: Hold the ribs in the middle with tongs. When they are ready, the rack will sag in a reversed U shape. The meat may crack, too, which is a good sign. Rib Twist: Grab an exposed bone tip with your tongs and gently twist. If the bone turns easily, the ribs are done. Toothpick Test: The meat is tender when a toothpick easily penetrates the meat between the ribs.
Instant Pot-to-Oven Baby Back Ribs:
Spread ribs with mustard and season with rub as above. Curl rib back inside the 6-quart pot of an electric pressure cooker with the meaty sides toward outside of pot. Sprinkle with any rub that falls off. Add 1 cup water to bottom of pot. (do not pour over ribs). Lock lid in place. Set to cook on high pressure for 40 minutes. Allow pressure to release for 15 minutes. Release any remaining pressure. Remove ribs to a foil-lined shallow baking pan, bone sides down (discard liquid in cooker). Preheat oven to 400°F. Brush some of the sauce over ribs. Bake ribs for 15 minutes, brushing with remaining sauce every 5 minutes.