Perfect Chicken Pot Pie Casserole

Ingredients

• 2 cups cooked chicken, shredded or diced 🍗
• 2 cups frozen mixed vegetables (peas, carrots, corn, and green beans) 🥕🌽
• 1 can (10.5 oz) cream of chicken soup 🥣
• 1 cup milk 🥛
• 1/2 cup chicken broth 🥣
• 1/2 tsp garlic powder 🧄
• 1/2 tsp onion powder 🧅
• 1/2 tsp dried thyme 🌿
• Salt and pepper to taste
• 1 tube refrigerated biscuit dough (or a pre-made pie crust) 🥖
• 1 tbsp butter, melted 🧈 (optional, for brushing)