In a small jar with tight-fitting lid, shake together all dry ingredients until well-blended.

Rub dry mixture onto all surfaces of ribs. Grill ribs over indirect heat in covered grill, turning occasionally, until ribs are very tender, about 1-1/2 hours.

Or roast ribs on rack in shallow pan in 350F oven for 1-1/2 hours.

Cut into 1- or 2-rib portions to serve.