Divide ribs between two large, heavy, sealable plastic bags.
In a bowl, stir together remaining ingredients and pepper, to taste, and pour over ribs. Seal bags, pressing out excess air. Marinate ribs, chilled, turning bags occasionally, overnight.
Preheat oven to 275 degrees F.
Transfer ribs and marinade to a roasting pan large enough to hold ribs in layer and roast ribs, covered, turning occasionally, for 4 hours.
Ribs may be made 2 days ahead, cooled, uncovered, and chilled, covered. Reheat ribs in a preheated 375 degrees F oven until hot, about 12 minutes.
