In a small bowl, combine sea salt, garlic powder, dry mustard, paprika, chili powder, onion powder, and pepper. Using a sharp knife, pierce thin membrane on back of ribs; peel off, and discard. Rub spice mixture over both sides of ribs. Wrap ribs in foil, and place on a baking sheet.
Bake for 2½ hours.
Spray grill racks with nonflammable cooking spray. Preheat grill to high heat (400° to 450°).
Remove ribs from foil. Pour 3 tablespoons rib juices into a small bowl. Stir in 3 tablespoons Root Beer Barbecue Sauce.
Grill ribs, meat side down, over direct heat, basting with juice mixture, until charred and crispy, about 10 minutes, turning once halfway through grilling. Serve with remaining Root Beer Barbecue Sauce.
Root Beer Barbecue Sauce
In a medium saucepan, whisk together all ingredients. Bring to a boil over medium heat. Reduce heat to low, and simmer, stirring occasionally, until thickened, about 45 minutes. Store in an airtight container for up to 3 weeks.
Recipe by Louisiana Cookin' at https://louisianacookin.com/barbecue-root-beer-ribs/