Remove husks and silk from corn. Wash corn and pat dry with paper towels. Combine remaining ingredients in a non-reactive bowl, whisk until well mixed and set aside. Prepare grill for medium-high heat and grease grill rack. Brush corn with basting mixture and place on rack about 3 inches above coals. Grill for approximately 20 minutes or until corn is fully cooked, turning each ear of corn a quarter turn and basting every 5 minutes. Serve hot.