01 -
Preheat the oven to 300°F. Line a rimmed baking sheet with foil for easier cleanup.
02 -
Pat the ribs dry. Remove the membrane from the bone side if it is still attached, then rub the racks with olive oil and apple cider vinegar.
03 -
Mix the salt, pepper, brown sugar, smoked paprika, garlic powder, onion powder, chili powder, dry mustard, and cayenne. Coat both sides of the ribs evenly.
04 -
Place each rack meat side up on heavy foil and wrap tightly. Set on the baking sheet and bake for 2 hours and 15 minutes to 2 hours and 30 minutes, until the racks bend easily and the meat pulls back from the bones.
05 -
Carefully open the foil packets. Brush the meaty side with barbecue sauce and leave the ribs uncovered.
06 -
Broil for 3-5 minutes, watching closely, until the sauce bubbles and turns sticky. Rest for 10 minutes, then slice between the bones and serve with extra sauce.