The time will depend on how you want your baby back ribs to be cooked. 16 minutes of cooking time will be enough to make them tender and give them a bit of a chew. After 25 minutes, the meat will be ready to fall off the bone, yet they will be moist and juicy. Use the NPR while cooking these ribs and preheat the oven while the ribs are in the pot. That way you can directly switch them into the oven once that is done in the pot.