Preheat your oven to 400 degrees. Place a large, oven proof dish in the oven with half the butter to melt. A pan with a lid is best. Season the bottoms and then the tops of the chicken thighs with all purpose seasoning and then lemon pepper seasoning. When the pan is hot and butter is melted, place the chicken thighs bottom side down in the pan. Bake for 15 until the tops are browned and the skin is crispy. Cover the dish with a lid or foil and cook for an additional 15 minutes or until the internal temperature is at last 185 degrees.