This Keto Chicken and Mushroom Casserole is a creamy, cheesy, and satisfying low-carb meal perfect for a comforting dinner. Tender chicken thighs slow cooked with mushrooms, garlic, and onion powder create rich flavors, complemented by a luscious mixture of heavy cream and cheddar cheese. Garnished with fresh parsley, it’s an easy and delicious keto-friendly casserole.