Preheat oven to 375 degrees Fahrenheit. Spray a 13" x 9" baking dish with non stick cooking spray. Add your 1/2 stick of butter to the dish and place in the oven to melt.
Once the butter has melted, remove the pan from the oven.
In a small mixing bowl, mix together biscuit mix, seasonings packet, seasonings, milk, shredded chicken, and shredded cheese. Set aside for 5 minutes while you prepare the soup mixture.
To a large mixing bowl, stir together frozen mixed vegetables, cream of chicken soup, and chicken broth. Mix well and pour over the butter in the baking dish.
Pour your chicken and biscuit mixture over the soup and veggies mixture.
Bake for 55-60 minutes until golden brown. Allow the casserole to sit for at least 10 minutes before serving. Enjoy!