Keto Garlic Mushroom Chicken Casserole Recipe
Introduction
This Keto Garlic Mushroom Chicken Casserole is a creamy, savory dish perfect for low-carb diets. Packed with tender chicken, sautéed mushrooms, and a cheesy garlic sauce, it’s both comforting and satisfying. A simple bake pulls all these flavors together for an easy weeknight meal.

Ingredients
- 2 cups cooked chicken (shredded or diced)
- 8 ounces mushrooms (sliced, button or cremini)
- 4 cloves garlic (minced)
- 1 cup heavy cream
- 1 cup shredded mozzarella cheese
- 1/2 cup grated Parmesan cheese
- 1 tablespoon olive oil
- 1 teaspoon dried thyme
- 1 teaspoon dried oregano
- Salt and pepper (to taste)
- 2 tablespoons fresh parsley (chopped, for garnish)
Instructions
- Step 1: Preheat your oven to 375°F (190°C).
- Step 2: Heat olive oil in a large skillet over medium heat. Add the sliced mushrooms and sauté for 5-7 minutes until they are golden brown and have released their moisture.
- Step 3: Add the minced garlic to the skillet and cook for 1-2 minutes until fragrant, stirring constantly to prevent burning.
- Step 4: In a large bowl, combine the cooked chicken, sautéed mushrooms and garlic, heavy cream, dried thyme, dried oregano, salt, and pepper. Mix well to combine all ingredients evenly.
- Step 5: Transfer the mixture into a greased 9×13-inch casserole dish, spreading it out evenly.
- Step 6: Sprinkle the shredded mozzarella and grated Parmesan cheese evenly over the top of the chicken mixture.
- Step 7: Bake the casserole in the preheated oven for 25-30 minutes, or until the cheese is bubbly and golden brown.
- Step 8: Remove from the oven and let it cool for a few minutes. Garnish with freshly chopped parsley before serving.
Tips & Variations
- For extra flavor, try adding a pinch of crushed red pepper flakes with the garlic.
- Swap mozzarella for cheddar or gouda for a different cheesy twist.
- Use spinach or kale along with mushrooms for added greens and nutrients.
- To make it creamier, stir in a few tablespoons of cream cheese with the heavy cream before mixing.
Storage
Store leftovers in an airtight container in the refrigerator for up to 3 days. Reheat gently in the microwave or oven until warmed through. Avoid overheating to keep the chicken tender and the sauce creamy.
How to Serve

Serve this delicious recipe with your favorite sides.
FAQs
Can I use raw chicken for this recipe?
This recipe calls for cooked chicken, so using raw chicken would require additional cooking time. It’s best to cook and shred or dice the chicken beforehand to ensure everything cooks evenly.
Is this casserole freezer-friendly?
Yes, you can freeze the casserole before baking. Wrap it tightly with plastic wrap and foil, then freeze for up to 2 months. Thaw overnight in the refrigerator before baking as directed.
PrintKeto Garlic Mushroom Chicken Casserole Recipe
This Keto Garlic Mushroom Chicken Casserole is a creamy, cheesy, and satisfying low-carb dish perfect for those following a ketogenic diet. Featuring tender cooked chicken, sautéed garlic mushrooms, and a rich blend of heavy cream and cheeses, this casserole is baked to bubbly, golden perfection and garnished with fresh parsley for a flavorful and comforting meal.
- Prep Time: 10 minutes
- Cook Time: 35 minutes
- Total Time: 45 minutes
- Yield: 4 servings 1x
- Category: Casserole
- Method: Baking
- Cuisine: American
- Diet: Low Carb
Ingredients
Chicken and Vegetables
- 2 cups cooked chicken (shredded or diced)
- 8 ounces mushrooms (sliced, button or cremini)
- 4 cloves garlic (minced)
Dairy and Cheese
- 1 cup heavy cream
- 1 cup shredded mozzarella cheese
- 1/2 cup grated Parmesan cheese
Seasonings and Oil
- 1 tablespoon olive oil
- 1 teaspoon dried thyme
- 1 teaspoon dried oregano
- Salt and pepper (to taste)
- 2 tablespoons fresh parsley (chopped, for garnish)
Instructions
- Preheat Oven: Preheat your oven to 375°F (190°C) to get it ready for baking the casserole.
- Sauté Mushrooms: Heat olive oil in a large skillet over medium heat. Add the sliced mushrooms and cook until they turn golden brown and release their moisture, about 5-7 minutes, stirring occasionally.
- Add Garlic: Mix in the minced garlic with the mushrooms and sauté for another 1-2 minutes until fragrant, making sure not to burn the garlic by stirring frequently.
- Combine Ingredients: In a large mixing bowl, combine the cooked chicken, sautéed mushrooms and garlic, heavy cream, dried thyme, dried oregano, salt, and pepper. Stir well until all ingredients are evenly incorporated.
- Assemble Casserole: Grease a 9×13-inch casserole dish and spread the chicken mixture evenly across the bottom of the dish.
- Add Cheese Topping: Sprinkle the shredded mozzarella and grated Parmesan cheese generously over the top of the chicken mixture, covering the surface evenly.
- Bake: Place the casserole dish in the preheated oven and bake for 25-30 minutes until the cheese is melted, bubbly, and golden brown on top.
- Garnish and Serve: Remove the casserole from the oven and let it rest for a few minutes. Garnish with freshly chopped parsley before serving to add a fresh and colorful touch.
Notes
- You can use either button or cremini mushrooms based on your preference for flavor and texture.
- For an extra creamy casserole, you can add a little cream cheese or substitute part of the mozzarella with cream cheese.
- Ensure the chicken is fully cooked before starting this recipe; leftover roasted or grilled chicken works great.
- Feel free to add other keto-friendly vegetables like spinach or zucchini if desired.
- If you want more herb flavor, you can add fresh thyme or oregano along with or in place of dried herbs.
- Leftovers can be stored in an airtight container in the refrigerator for up to 3 days.
- To reheat, bake at 350°F (175°C) until warmed through and cheese is bubbly.
Keywords: Keto chicken casserole, garlic mushroom casserole, low carb casserole, keto dinner, creamy chicken casserole, baked chicken with mushrooms

