Pressure Cooker Pork Rib Carnitas are tender and flavorful pulled pork ribs that are cooked in a pressure cooker for a fraction of the time it would take to cook them in the oven or on the grill. The ribs are seasoned with a blend of spices, then pressure cooked until they are fall-off-the-bone tender. The result is juicy and flavorful meat that can be used in tacos, burritos, or served on its own with your favorite sides.