how long to cook pork ribs in oven
1 Broil the ribs for about 5 minutes, until the sugar in the dry rub is bubbling and the ribs are evenly browned.  Bake the ribs: Set the oven to 300Â°F. Move the ribs to an oven rack in the middle of the oven. Roast for 2 1/2 to 3 hours for spare ribs or 1 1/2 to 2 hours for baby back ribs. Halfway through cooking, cover the ribs with aluminum foil to protect them from drying out.