- Preheat oven to 350°F (175°C) and grease a 9×13-inch baking dish. 
- In a large bowl, combine shredded chicken, cream of chicken soup, milk, shredded cheese, peas and carrots (if using), garlic powder, onion powder, salt, and pepper. Mix until well combined. 
- Pour the chicken mixture into the prepared baking dish. 
- Separate the biscuits and cut each into quarters. Scatter the biscuit pieces evenly over the top of the chicken mixture. 
- Bake for 25–30 minutes, or until the biscuits are golden brown and the casserole is bubbly. 
- Let the casserole cool for a few minutes before serving. 
