Keto Cheesy Chicken Mushroom Green Bean Bake
Boneless chicken breasts scored and marinated in a tangy sour cream sauce, then baked atop sautéed mushrooms and green beans, finished with melted mozzarella and parmesan. A low-carb, creamy casserole combining tender chicken with earthy vegetables and rich cheese topping.
Ingredients
- 1 lb boneless skinless chicken breast halves
- 3 tbsp full-fat sour cream
- 2 tbsp heavy cream
- 2 tsp coconut aminos
- ½ tsp sea salt, divided
- ⅛ tsp black pepper
- 2 cloves garlic, minced
- 2 cups sliced white or button mushrooms
- 1 ½ cups green beans, chopped
- 1 cup shredded mozzarella cheese
- 2 tbsp grated parmesan cheese
Instructions
- 1
Preheat oven to 400°F and grease a 10-13 inch casserole dish.
- 2
Score one side of each chicken breast in a grid pattern without cutting all the way through.
- 3
Whisk together sour cream, heavy cream, coconut aminos, minced garlic, half the sea salt, and black pepper.
- 4
Coat chicken breasts in the cream sauce and let marinate for 20 minutes.
- 5
Rinse and trim green beans, then chop them. Slice mushrooms.
- 6
Spread mushrooms and green beans in the casserole dish and sprinkle with remaining sea salt.
- 7
Place marinated chicken on top of vegetables and pour any remaining cream sauce over everything.
- 8
Bake for 30 minutes.
- 9
Sprinkle mozzarella and parmesan cheese over the top and return to oven.
- 10
Bake for 10 to 15 minutes until chicken is cooked through.
- 11
Serve, spooning pan juices over chicken and vegetables.
Tips
Scoring the chicken allows the marinade to penetrate and promotes even cooking.
Reserve pan juices to drizzle over finished dish for added flavor and moisture.
Good to Know
Cover and refrigerate up to 3 days. Reheat gently in 350°F oven until warmed through.
Prepare through step 7 up to 8 hours ahead. Cover and refrigerate. Add 5 minutes to final baking time if baking from cold.
Spoon pan juices over each serving. Pair with a simple green salad or cauliflower rice.
Common Mistakes
Skip marinating to avoid dry chicken that hasn't absorbed the sauce flavor.
Don't overbake after adding cheese to prevent rubbery texture.
Rinse green beans properly to avoid gritty texture in the final dish.