Keto Garlic Mushroom Chicken Casserole Recipe
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If you’re craving a comforting yet low-carb meal that feels like a warm hug on a plate, you’re going to love this Keto Garlic Mushroom Chicken Casserole Recipe. It’s creamy, cheesy, and packed with tender chicken and savory mushrooms, all brought together by that irresistible garlic flavor. This dish perfectly balances rich textures with fresh herbs, making it a family favorite and an absolute must-try for anyone following a keto lifestyle or just looking for something hearty and satisfying.

Ingredients You’ll Need
Getting your ingredients lined up for this Keto Garlic Mushroom Chicken Casserole Recipe is a breeze, and each item plays a crucial role in delivering that perfect harmony of flavors and textures. From the creamy cheeses to the earthy mushrooms and fragrant herbs, every single ingredient adds its own magic.
- Cooked chicken (2 cups): shredded or diced, it’s the hearty protein base that makes this casserole so fulfilling.
- Mushrooms (8 ounces): sliced button or cremini mushrooms give an earthy, umami-rich depth that pairs beautifully with the garlic.
- Garlic (4 cloves): minced fresh garlic infuses the dish with a warm, aromatic punch that cannot be beaten.
- Heavy cream (1 cup): provides that luscious, velvety texture that binds everything together without overpowering the flavors.
- Shredded mozzarella cheese (1 cup): melts into gooey, stringy perfection for that comfort-food feel.
- Grated Parmesan cheese (1/2 cup): delivers a sharp, nutty tang that ups the flavor game.
- Olive oil (1 tablespoon): for sautéing the mushrooms, bringing out their flavor and keeping things silky.
- Dried thyme (1 teaspoon): adds a subtle herbaceous note that complements the garlic and mushrooms.
- Dried oregano (1 teaspoon): introduces a hint of Mediterranean flair, tying the flavors together perfectly.
- Salt and pepper: to taste, seasoning the dish just right without overpowering its natural flavors.
- Fresh parsley (for garnish): chopped and sprinkled on top for a fresh, vibrant finish.
How to Make Keto Garlic Mushroom Chicken Casserole Recipe
Step 1: Preheat and Prep
First things first, set your oven to 375°F (190°C). Preheating ensures your casserole bakes to that gorgeous golden brown perfection, marrying crispiness with creaminess in every bite.
Step 2: Sauté the Mushrooms
Heat the olive oil in a large skillet over medium heat. Toss in your sliced mushrooms and sauté them until they turn golden brown and release their moisture. This usually takes about 5 to 7 minutes and unlocks their deep, rich flavor, which is essential to the dish’s soul.
Step 3: Add Garlic for Aroma
Once your mushrooms are beautifully browned, add the minced garlic to the skillet. Cook for another 1 to 2 minutes, stirring constantly to prevent burning. This step fills your kitchen with that heavenly garlicky scent that promises something amazing is on its way.
Step 4: Mix It All Together
In a large mixing bowl, combine the cooked chicken, the sautéed mushrooms and garlic, heavy cream, dried thyme, oregano, salt, and pepper. Stir everything until it’s evenly coated in creamy goodness, making sure every bite will be bursting with flavor and richness.
Step 5: Assemble the Casserole
Transfer this luscious mixture into a greased 9×13-inch casserole dish. Spread it out evenly as the base for your dish, which will soon be smothered in irresistible cheese.
Step 6: Cheese Topping
Generously sprinkle the shredded mozzarella and grated Parmesan cheese over the chicken mixture. This cheesy layer creates an indulgent crust that bakes up bubbling and golden, sealing in all the savory ingredients beneath.
Step 7: Bake to Perfection
Pop your casserole into the preheated oven and bake for 25 to 30 minutes. You want to wait until the cheese is bubbly and has a beautiful golden hue—this signals that it’s ready to be devoured.
Step 8: Garnish and Rest
Remove the casserole from the oven and let it sit for a few minutes. This resting time helps everything settle so that when you dig in, the layers hold together beautifully. Finish by sprinkling chopped fresh parsley on top for that lovely pop of color and fresh flavor.
How to Serve Keto Garlic Mushroom Chicken Casserole Recipe

Garnishes
A sprinkle of fresh parsley adds brightness and a hint of earthiness that balances the rich cream and cheese beautifully. You could also try a few slivers of fresh basil or a pinch of red pepper flakes if you want to give it a little extra kick.
Side Dishes
This casserole is hearty enough to stand on its own but pairs wonderfully with simple keto sides like sautéed green beans, a crisp garden salad tossed in lemon vinaigrette, or roasted Brussels sprouts to add a crunchy contrast to the creamy casserole texture.
Creative Ways to Present
Serve individual portions in small ramekins for a charming presentation if you’re hosting guests. Alternatively, layer it over cauliflower rice for a one-dish meal that’s both nutritious and visually appealing. Don’t forget a drizzle of extra olive oil or a dollop of sour cream to amp up indulgence.
Make Ahead and Storage
Storing Leftovers
Leftovers from this Keto Garlic Mushroom Chicken Casserole Recipe keep wonderfully in an airtight container in the refrigerator for up to 3 days. Simply cover and chill, ready for a quick reheat whenever you need a comforting meal.
Freezing
This casserole freezes beautifully, making it a perfect meal prep option. Portion it into freezer-safe containers and freeze for up to 2 months. When you’re ready to enjoy, thaw in the fridge overnight before reheating.
Reheating
Reheat your casserole gently in a 350°F (175°C) oven until warmed through to preserve the texture and avoid drying it out. Microwaving works in a pinch but keep it covered to retain moisture and prevent the cheese from becoming rubbery.
FAQs
Can I use fresh herbs instead of dried thyme and oregano?
Absolutely! Fresh herbs can brighten the flavor even more. Use about three times the amount of fresh herbs in place of dried. Just add them towards the end of mixing to retain their freshness.
Is this recipe suitable for meal prep?
Definitely. The Keto Garlic Mushroom Chicken Casserole Recipe stores well in the fridge and freezer, making it a convenient, make-ahead option for busy days or quick dinners.
Can I substitute the cheeses in this casserole?
Yes! If you prefer, you can swap mozzarella for cheddar or use a sharper Parmesan alternative. Just keep the total cheese amount about the same to maintain the creamy texture.
What if I don’t have heavy cream?
Heavy cream is key for creaminess and richness but you can use full-fat coconut milk in a pinch for a dairy-free option. The flavor will be slightly different, but still delicious!
Can I add vegetables to this casserole?
Of course! Low-carb veggies like spinach, zucchini, or broccoli can be great additions. Just be sure to sauté or steam them first to prevent excess moisture from making the casserole too watery.
Final Thoughts
I can’t recommend this Keto Garlic Mushroom Chicken Casserole Recipe enough for anyone looking to combine ease, flavor, and comfort in one incredible dish. Whether you’re new to keto or just craving a dish that feels like a cozy night in, this casserole is sure to become a staple in your recipe box. Trust me, once you try it, you’ll keep coming back for more.
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PrintKeto Garlic Mushroom Chicken Casserole Recipe
This Keto Garlic Mushroom Chicken Casserole is a rich, creamy, and cheesy low-carb comfort dish that’s perfect for a satisfying dinner. Tender cooked chicken is combined with sautéed mushrooms and garlic, then baked with a blend of mozzarella and Parmesan cheese to create a bubbly, golden casserole. With fragrant herbs and a touch of heavy cream, this casserole is flavorful and indulgent while keeping it keto-friendly.
- Prep Time: 10 minutes
- Cook Time: 30 minutes
- Total Time: 40 minutes
- Yield: 4 servings 1x
- Category: Main Course
- Method: Baking
- Cuisine: American
- Diet: Low Carb
Ingredients
Chicken Mixture
- 2 cups cooked chicken, shredded or diced
- 8 ounces mushrooms, sliced (button or cremini)
- 4 cloves garlic, minced
- 1 cup heavy cream
- 1 teaspoon dried thyme
- 1 teaspoon dried oregano
- Salt and pepper, to taste
- 1 tablespoon olive oil
Cheese Topping
- 1 cup shredded mozzarella cheese
- 1/2 cup grated Parmesan cheese
Garnish
- Fresh parsley, chopped (for garnish)
Instructions
- Preheat Oven: Preheat your oven to 375°F (190°C) to ensure even baking and a nicely browned top.
- Sauté Mushrooms: Heat the olive oil in a large skillet over medium heat. Add the sliced mushrooms and sauté for 5-7 minutes until golden brown and their moisture has evaporated.
- Add Garlic: Stir in the minced garlic and cook for another 1-2 minutes until fragrant, being careful not to burn it.
- Combine Ingredients: In a large mixing bowl, combine the cooked chicken, sautéed mushrooms and garlic, heavy cream, dried thyme, dried oregano, salt, and pepper. Mix thoroughly until well incorporated.
- Assemble Casserole: Transfer the mixture to a greased 9×13-inch casserole dish and spread evenly.
- Add Cheese: Sprinkle shredded mozzarella and grated Parmesan cheese evenly over the top of the chicken mixture.
- Bake: Place the casserole in the preheated oven and bake for 25-30 minutes, or until the cheese is bubbly and golden brown.
- Garnish and Serve: Remove from the oven and allow to cool slightly. Garnish with freshly chopped parsley and serve warm.
Notes
- Use cooked chicken from rotisserie, grilled, or boiled as preferred for convenience.
- You can substitute heavy cream with full-fat coconut cream for a dairy-free version.
- Make sure to sauté mushrooms properly to avoid a soggy casserole.
- For added flavor, sprinkle some red pepper flakes before baking if you like some heat.
- Leftovers keep well refrigerated for up to 3 days and reheat nicely in the oven or microwave.
Keywords: keto chicken casserole, garlic mushroom chicken, low carb casserole, cheesy chicken bake, keto dinner recipes
