
Baking low and slow makes these oven-baked ribs fall off the bone tender. Once baked, we add our sweet and spicy BBQ sauce to the ribs, but you can use whatever you love. For the most tender ribs, we remove the thin membrane covering the back of the rack. Depending on where you purchased the ribs, this may already be done for you. If not, instructions are in the tips below the recipe.
Preheat the oven to 275°F (135°C). Set aside a large roasting pan or rimmed baking sheet and foil.
While the ribs bake in the oven, make the barbecue sauce. Heat the olive oil in a saucepan over medium heat. Add the onions and cook until soft and translucent, 5 to 8 minutes.
Remove the ribs from the oven, discard the aluminum foil, and generously brush both sides with barbecue sauce.