1 cup turbinado sugar, ground
1/4 cup kosher salt
6 tablespoons Spanish paprika
4 tablespoons chili powder
2 tablespoons granulated garlic
1 tablespoon onion powder
2 teaspoons ground cumin
2 teaspoons ground mustard
1 1/2 teaspoons cayenne pepper
1 teaspoon black pepper, coarse ground
One 2.25-pound slab of baby back pork ribs (also known as loin-back ribs)
2 tablespoons yellow mustard
2 tablespoons BBQ sauce, for glazing, optional