1 tablespoon paprika 1 1/2 teaspoons dark brown sugar 1 1/2 teaspoons finely grated orange zest 1 1/4 teaspoons salt 3/4 teaspoon ground cumin 1/2 teaspoon ground black pepper 1/4 teaspoon cayenne pepper, to taste 4 pounds baby back ribs, cut into 2-rib portions In a small bowl, stir together all ingredients except the ribs.