Combine all coating mix ingredients in a small mixing bowl.
Preheat oven to 350°F. Place baking pan with butter in the preheating oven.
Dredge each chicken piece in the coating mix, coating all sides; retain any remaining coating mix; set aside.
When butter is melted, remove baking pan from oven.
Place each coated chicken piece in pan, skin-side-down; bake uncovered 25 minutes; turn each piece over; return to oven and bake 25 more minutes. If you wish to have crispier and/or more golden chicken, increase oven temp to 425°F for last 25 minutes.
Transfer chicken to an oven-safe platter and keep warm in cooling oven.
Transfer drippings from baking pan to a small saucepan; over medium heat, stir in milk; cook until thickened, stirring continuously. Use remaining coating mix, if needed, to thicken gravy.
