Step 1

Preheat the oven to 275°F. In a small bowl, stir together the salt, black pepper, and cayenne. Season the ribs all over with the spice mixture. Line 2 large rimmed baking sheets with aluminum foil. Arrange the ribs in a single layer on the baking sheets. Cover the ribs tightly with foil and bake until tender, 2 to 2 1/2 hours. Carefully uncover the ribs, and drain any liquid from the baking sheet.

Step 2

Brush both sides of ribs evenly with 1 cup of barbecue sauce. Return to the oven and bake until ribs are fall-apart tender, about 15 to 30 minutes. Serve ribs with additional barbecue sauce.