Preheat your oven to 375 degrees Fahrenheit. Spray a 13"x9" baking dish with non-stick cooking spray. Place the butter in your greased casserole dish and stick the dish in the oven to melt the butter. Once melted, remove the pan from the oven.
In a small bowl, mix together Red Lobster Cheddar Bay Biscuit Mix (with seasoning packet), paprika, garlic powder, onion powder, Cajun seasoning, milk, and shredded cheese.
In a separate bowl, stir together the mixed frozen vegetables, cream of chicken soup, chicken broth, and shredded chicken. Mix well and spread the chicken mixture evenly over the melted butter in the baking dish.
Pour the biscuit mixture evenly over the soup and chicken mixture. Do not stir the layers together. Place into the oven for 55 minutes to one hour, or until the top is golden brown. If you find the Cheddar Bay biscuits are getting too brown, tent it with foil. I usually check around the 30 minute mark.
Sprinkle with freshly chopped parsley, if desired, and allow the casserole to rest for 5–10 minutes before serving. Enjoy!