01 -
Preheat oven to 350°F (175°C). Lightly grease a 9x13-inch (23x33 cm) baking dish with nonstick spray or butter.
02 -
In a large mixing bowl, thoroughly combine the cooked chicken, cream of chicken soup, sour cream or Greek yogurt, milk, mixed vegetables, garlic powder, onion powder, salt, and pepper. Stir until the mixture is even and fully combined.
03 -
Gently fold the quartered biscuit dough pieces into the filling mixture, ensuring all pieces are coated.
04 -
Transfer the entire mixture to the prepared baking dish and spread evenly. Sprinkle shredded cheese uniformly over the top.
05 -
Cover the dish with aluminum foil and bake on the center oven rack for 20 minutes. Remove foil and continue baking for an additional 10 to 15 minutes, until the biscuits are golden brown and cooked through.
06 -
If desired, brush melted butter over the biscuits while hot. Allow the casserole to cool for several minutes before portioning and serving.