Preheat the oven to 300°F (150°C).
Remove the membrane from the back of the ribs.
Rub the ribs with olive oil.
Mix salt, pepper, garlic powder, onion powder, and smoked paprika.
Coat the ribs with the spice mixture.
Place the ribs on a baking sheet lined with aluminum foil.
Cover the ribs tightly with foil.
Bake in the oven for 2.5 hours.
Remove the foil and brush barbecue sauce over the ribs.
Increase the oven temperature to 400°F (200°C) and bake for an additional 30 minutes.