Preheat oven to 350°F and cover a rimmed baking sheet with foil.
Cut ribs apart and lay them fat-side down on the sheet, not touching.
Bake for 45 minutes.
Brush generously with barbecue sauce.
Bake for 15 more minutes.*
Apply another coat of barbecue sauce if desired.
*Once in a while, you get a really meaty rib or two, usually on the ends, that may require a little extra cooking time.
I find 3 ribs per person to be a good serving size when served with sides. If making for a crowd, you can do two racks at the same time, just swap the top and bottom halfway through to ensure everything is cooking evenly.