This Keto Garlic Mushroom Chicken Casserole is a creamy, savory oven-baked dish made with tender chicken thighs, sautéed mushrooms, and a rich garlic cream sauce. Comforting, low-carb, and built to hold its texture without fillers.
- 2 lb chicken thigh (skinless, boneless)
- 12 oz mushrooms (sliced)
- 1 ¼ cups heavy cream
- 4 cloves garlic (minced)
- 1 tsp onion powder
- 1 tsp dried thyme
- ¾ tsp salt
- ½ tsp black pepper
- ½ cup shredded mozzarella cheese
- ¼ cup grated Parmesan cheese
- 2 tbsp butter
- 1 tbsp olive oil
Preheat the oven to 375°F and lightly grease a baking dish.
Heat olive oil and butter in a skillet over medium heat. Add mushrooms and cook until browned and most moisture has evaporated.
Add minced garlic to the mushrooms and cook for 30 seconds until fragrant. Remove from heat.
Arrange the chicken thighs evenly in the prepared baking dish.
Spread the mushroom and garlic mixture over the chicken.
In a bowl, whisk together heavy cream, onion powder, dried thyme, salt, and black pepper.
Pour the cream mixture evenly over the chicken and mushrooms.
Sprinkle mozzarella and Parmesan evenly on top.
Bake uncovered for 40–45 minutes, until the chicken is cooked through and the sauce is thick and bubbling.
Rest for 5 minutes before serving.