Place chicken on a cutting board and remove any giblets or extra parts from inside the chicken. Sprinkle the seasoning mix over the chicken, front, back, sides and under the wings. Place the seasoned chicken, breast side up, in a large cast iron or oven-safe skillet. Arrange lemon cut side down in the skillet under the wings and legs.
Wash your hands well with soap and warm water for at least 20 seconds.
Melt butter and pour over chicken. Place skillet in the oven and bake for 45-60 minutes depending on size or until the chicken reaches an internal temperature of 165°. Remove chicken from the oven and let sit for 15 minutes. Slice chicken, remove skin and serve.