Instructions

1. Remove skin or membrane from back of ribs. Sprinkle rub generously over ribs. Let rub soak into ribs over night or 8 hours in the refrigerator or at least 2 hours.
2. Preheat the oven to 250 degrees. In a small bowl, mix 1 cup barbecue sauce, water, and liquid smoke together and pour into the bottom of a roasting pan. Wrap each rack of ribs with a double layer of foil and place on a rack over the barbecue sauce mixture.
3. Bake baby back ribs for 2 hours and spareribs for 3 hours, basting every 30 minutes with barbecue sauce mixture from the roasting pan. Bake until tender but not falling off the bone.
4. Fire up the charcoal grill or gas grill to high. Grill ribs and baste with barbecue sauce and turning frequently, until lacquered and charred in places and heated thoroughly, 8 to 10 minutes. Transfer to a cutting board; cut between ribs to separate. Transfer to a serving platter and serve with additional barbecue sauce. Note: ribs should be cooked to 145 degrees.