Watermelon and toasted baguette slices, for serving
Instructions
Preheat the oven to 300°. Combine the chili powder, onion powder, salt, paprika, brown sugar, black pepper and cayenne in a medium bowl. Sprinkle the spice mix on both sides of each rack of ribs (use all of the spice mix). Wrap each rack individually in a double layer of foil and divide between 2 rimmed baking sheets. Bake the ribs until the meat will easily pull apart with a fork but the racks still hold together, about 2 hours 15 minutes to 2 hours 30 minutes.
When the ribs are finished roasting, preheat a grill to medium. Unwrap the ribs. Brush each side with 2 to 3 tablespoons BBQ sauce. Grill the ribs meat-side down until well marked and the ribs release easily from the grill, 3 to 4 minutes. Flip and continue grilling until well marked on the other side, 2 to 3 minutes.
Transfer the ribs to a cutting board and generously brush each rack with more sauce. Slice into 4-rib portions. Serve with watermelon and baguette.
