Preheat the oven:
Preheat your oven to 150°C (300°F). Line a baking sheet with foil and place a wire rack on top of it.

Prepare the ribs:
Remove the silver skin from the ribs (the thin membrane on the back) by gently pulling it off with a paper towel. Pat the ribs dry with paper towels.

Season the ribs:
Rub the ribs with olive oil, then season generously with salt, pepper, paprika, garlic powder, onion powder, cumin, and chili powder (if using). Massage the seasoning into the ribs on both sides.

Bake the ribs:
Place the ribs bone-side down on the wire rack. Cover with another piece of foil and bake for 2½–3 hours, or until the ribs are tender and cooked through.

Add the barbecue sauce:
Remove the ribs from the oven and discard the top layer of foil. Brush a generous amount of barbecue sauce over the ribs. Return the ribs to the oven and bake, uncovered, for an additional 20–30 minutes, basting with more sauce halfway through, until the sauce is caramelized and sticky.

Serve:
Remove the ribs from the oven and let them rest for 5 minutes. Slice between the ribs and serve with extra barbecue sauce on the side.

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