Heat oven to 425 degrees. In a 13x9 pan, place butter. Heat in oven 2-3 minutes or until melted. In a shallow dish, stir Bisquick mix, pepper and paprika. Pour milk into small bowl. Coat chicken with Bisquick mixture then dip into milk and coat again with Bisquick mixture. Place chicken in pan. Bake uncovered about 30 minutes or until juice of chicken is clear and temperature reaches 170 degrees. In small microwave bowl, microwave barbecue sauce on high about 30 seconds. Spoon sauce over chicken and top with cheese.