1Heat oven to 425°F. In 13x9-inch pan, place butter. Heat in oven 2 to 3 minutes or until melted.
2In shallow dish, stir Bisquick mix and pepper. Pour milk into small bowl. Coat chicken with Bisquick mixture, then dip into milk and coat again with Bisquick mixture. Place chicken in pan.
3Bake uncovered about 30 minutes or until juice of chicken is clear when center of thickest part is cut (170°F).
4In small microwavable bowl, microwave barbecue sauce uncovered on High about 30 seconds or until warm. Spoon sauce evenly over chicken; top with cheese.