The aroma of sizzling garlic fills my kitchen, immediately transporting me to a cozy family dinner. Today, I’m excited to share my latest creation: a Creamy Keto Garlic Mushroom Chicken Casserole. This dish embraces tender chicken, earthy mushrooms, and a rich, cheesy sauce—perfect for those evenings when comfort food calls, but you still want to stick to your keto lifestyle. Not only is it low-carb and high in protein, but it’s also a breeze to prepare, making it an ideal choice for busy evenings! Each bite is a delightful hug, and the best part? It warms up beautifully, allowing you to enjoy it throughout the week. Curious about how to whip up this delightful casserole? Let’s dive in!

Why is this casserole a must-try?
Comforting and Cozy: This Keto Garlic Mushroom Chicken Casserole wraps you in warmth with every bite, making it a perfect dish for family gatherings or cozy nights in.
Rich and Creamy Flavor: The blend of heavy cream, cream cheese, and cheddar creates an indulgent sauce that pairs beautifully with tender chicken and mushrooms.
Easy to Prepare: With simple steps and minimal ingredients, you can have this dish ready in no time, making it a go-to for busy weeknights.
Versatile Ingredients: Feel free to mix in your favorite veggies or swap proteins; it’s just as delicious with chickpeas or lentils for a satisfying vegetarian option.
Great for Meal Prep: Enjoy the convenience of leftovers, perfect for quick lunches or dinners throughout the week. Looking for more meal prep ideas? Check out my Ginger Scallion Chicken for a delicious variation!
Each scoop of this casserole is undeniably a delicious choice for anyone craving hearty comfort food without compromising their diet. Enjoy!
Keto Garlic Mushroom Chicken Ingredients
Unlock the secrets to a delightful Keto Garlic Mushroom Chicken Casserole with these simple ingredients.
For the Chicken
- Chicken breast – A primary protein source; for richer flavor, feel free to substitute with chicken thighs.
For the Sauce
- Heavy cream – This provides the creamy, rich base for the casserole; coconut cream can be used as a dairy-free alternative.
- Cream cheese – Adds a tangy creaminess to the dish; consider using Neufchâtel for a lighter option.
- Garlic – Fresh garlic enhances the flavor immensely; in a pinch, garlic powder works just fine.
- Cheddar cheese – Offers melty goodness; mix in other cheeses like mozzarella or gouda for added flavor depth.
For the Flavor
- Mushrooms – Provide an earthy texture; portobello or cremini mushrooms give a richer taste.
- Italian seasoning – A blend of herbs that infuse the casserole with flavor; use fresh herbs like basil or oregano for a fresh twist.
- Salt and pepper – Essential for bringing out all the flavors; adjust according to your taste.
This Keto Garlic Mushroom Chicken Casserole not only warms your heart but satisfies your cravings while keeping it low-carb! Enjoy preparing this dish that’s perfect for any dinner table.
Step‑by‑Step Instructions for Keto Garlic Mushroom Chicken Casserole
Step 1: Preheat the Oven
Begin by preheating your oven to 375°F (190°C), allowing it to reach a cozy, warm temperature while you prepare the other ingredients. This step ensures a perfectly baked Keto Garlic Mushroom Chicken Casserole with a golden, bubbling top. Set out a casserole dish to have handy for the final bake.
Step 2: Sauté the Garlic and Chicken
In a large skillet over medium heat, add a splash of oil and sauté minced garlic until fragrant, about 1-2 minutes, watching closely to prevent burning. Once aromatic, add the chicken breast, cooking for approximately 5-7 minutes on each side or until golden brown and cooked through. Transfer the chicken to a plate and let it rest briefly.
Step 3: Cook the Mushrooms
In the same skillet, add sliced mushrooms to the remaining oil and cook for about 4-5 minutes, stirring occasionally until they soften and release their earthy juices. Make sure to keep the heat at medium to achieve a lovely golden color without overcooking them. Once perfect, set the mushrooms aside with the chicken.
Step 4: Create the Creamy Sauce
Reduce the heat to low, then return the chicken and mushrooms to the skillet. Pour in the heavy cream and add cream cheese, stirring gently for about 3-4 minutes until the mixture becomes smooth and creamy with no lumps. The aroma will fill your kitchen as the flavors meld together beautifully.
Step 5: Add Cheddar and Seasoning
Mix in shredded cheddar cheese and season with salt, pepper, and Italian seasoning, stirring until everything is well incorporated and the cheese has melted, creating an irresistible mixture. This step will add that comforting, cheesy layer to your Keto Garlic Mushroom Chicken, enhancing every bite of the casserole.
Step 6: Transfer to Casserole Dish
Carefully pour the creamy chicken and mushroom mix into your pre-prepared casserole dish, spreading it evenly for consistent cooking. This allows for the cheese to develop a perfect crust during baking. Smooth the top with a spatula to make it inviting for when it comes out of the oven.
Step 7: Bake to Perfection
Place the casserole in the preheated oven, baking it for 20-25 minutes or until bubbly and golden on top. Keep an eye on it during the last few minutes, ensuring that it achieves that beautiful, inviting color. The anticipation will build as you wait for your Keto Garlic Mushroom Chicken Casserole to finish cooking.
Step 8: Cool and Serve
Once done, remove the casserole from the oven and allow it to cool for about 5-10 minutes before serving. This resting time enhances the flavors and makes for easier serving. Gather your loved ones and enjoy this creamy, comforting dish that is sure to warm your hearts!

Make Ahead Options
These Keto Garlic Mushroom Chicken Casseroles are perfect for busy home cooks looking for meal prep solutions! You can sauté the chicken and mushrooms up to 24 hours in advance, allowing the flavors to meld beautifully. Store them in an airtight container in the refrigerator, ensuring they maintain their delightful texture. When you’re ready to serve, follow your baking instructions, pouring the creamy sauce over the prepped ingredients and baking until bubbly and golden. This way, you can enjoy a comforting, homemade casserole with minimal effort on a busy weeknight, delivering just as delicious results!
How to Store and Freeze Keto Garlic Mushroom Chicken
Fridge: Store leftovers in an airtight container for up to 3 days. This will keep the creamy texture intact and ensure the flavors remain vibrant.
Freezer: For longer storage, freeze the casserole in a freezer-safe container for up to 2 months. Allow it to cool completely before wrapping to prevent freezer burn.
Reheating: To reheat, thaw in the fridge overnight, then warm up in the oven at 350°F (175°C) until heated through, about 20-25 minutes. This method will keep the Keto Garlic Mushroom Chicken casserole lovingly creamy and delicious.
Keto Garlic Mushroom Chicken: Exciting Variations!
Feel free to get creative with your Keto Garlic Mushroom Chicken Casserole—there are endless ways to add your personal touch!
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Dairy-Free: Substitute heavy cream and cream cheese with full-fat coconut cream for a rich, creamy base without dairy. The flavor will remain indulgent and delicious!
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Vegetarian Twist: Replace chicken with chickpeas or lentils for a hearty vegetarian option that still packs a protein punch. This makes the casserole perfect for all kinds of eaters!
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Spicy Kick: Add diced jalapeños or red pepper flakes to the mix for a surprising heat that elevates the whole dish. For those who enjoy spice, this is a sure-fire way to kick it up a notch!
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Cheesy Variations: Experiment with different cheese, like pepper jack or feta, to bring new flavors into each bite. Mixing in mozzarella will deliver an extra cheesy, gooey texture—perfect for any cheese lover!
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Extra Greens: Toss in fresh spinach or diced bell peppers alongside the mushrooms for a colorful, nutritious boost. These can add both taste and delightful textures that make every bite enjoyable!
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Nutty Flavor: Sprinkle in some toasted pine nuts or slivered almonds for a crunchy texture that contrasts beautifully with the creamy sauce. It’s a simple way to enhance the dish’s overall flavor profile!
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Herb Infusion: Swap out Italian seasoning with fresh herbs like thyme or rosemary for a fragrant twist. The aroma from these herbs will bring a whole new level of comfort to your casserole!
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Satisfying Grain: For a heartier option, stir in cooked quinoa or cauliflower rice to bulk it up further, making it an even more filling meal. This helps create a delightful texture while also adhering to keto-friendly principles!
With so many delectable variations, you can find the perfect fit for any palate. If you’re looking for more inspiration, why not check out my Cowboy Butter Chicken for another delicious recipe to add to your collection?
What to Serve with Keto Garlic Mushroom Chicken Casserole
Create a memorable meal by pairing your comforting casserole with these delicious sides and drinks that elevate the dining experience.
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Garlic Parmesan Green Beans: Tender green beans tossed in garlic and parmesan provide a crisp, fresh contrast to the creamy casserole, adding a delightful crunch.
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Zucchini Noodles: Light and zesty, these noodles enhance your meal with a fresh flavor, perfect for scooping up the creamy sauce while keeping it low-carb.
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Cauliflower Rice: Fluffy and subtle, cauliflower rice offers a great base for soaking up the rich, cheesy goodness of your casserole, keeping it filling yet light.
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Side Salad with Vinaigrette: A refreshing mix of greens tossed in a zesty vinaigrette complements the richness of the casserole, providing a lovely balance of flavors.
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Broccoli with Lemon Butter: Steamed broccoli drizzled with lemon butter adds a bright note that complements the savory, cheesy casserole perfectly.
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Sparkling Water with Lime: Enhance your meal with this refreshing drink that cleanses the palate, creating a delightful contrast to the creamy flavors of the casserole.
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Low-Carb Cheesecake: A slice of this creamy dessert is the perfect sweet ending to your meal, enriching your dining experience without compromising your keto diet.
Enjoy experimenting with these pairings to create the ultimate comforting dinner that warms both heart and home!
Tips for the Best Keto Garlic Mushroom Chicken
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Cook Chicken Thoroughly: Ensure the chicken is cooked through before combining it with the sauce for a tender texture and safety.
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Avoid Overcooking Mushrooms: Sauté mushrooms just until softened for a delightful bite; overcooking will make them mushy.
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Use Fresh Ingredients: Fresh garlic and herbs bring vibrant flavors to your casserole, enhancing the overall taste of the Keto Garlic Mushroom Chicken.
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Monitor Baking Time: Keep an eye on the casserole during the last minutes of baking; a golden, bubbly top signifies it’s ready.
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Customize Cheese Varieties: Feel free to mix cheeses for a unique flavor twist; combining gouda or mozzarella with cheddar can elevate your dish!

Keto Garlic Mushroom Chicken Casserole Recipe FAQs
What type of chicken should I use for this casserole?
Absolutely! While chicken breast is the primary protein source, you can substitute with chicken thighs for a juicier and more flavorful dish. Consider your preferences or what you have on hand!
How can I store leftovers of the casserole?
Very! Store any leftovers in an airtight container in the fridge for up to 3 days. This helps maintain the casserole’s creamy texture and delicious flavors for your next meal. Just make sure it’s fully cooled before sealing it up.
Can I freeze the Keto Garlic Mushroom Chicken Casserole?
Absolutely! To freeze, allow the casserole to cool completely, then transfer it to a freezer-safe container or wrap it tightly in plastic wrap and foil. It can be frozen for up to 2 months. When ready to enjoy, thaw it overnight in the fridge and reheat in the oven for a deliciously creamy meal!
What should I do if my sauce is too thick?
No worries! If your sauce turns out thicker than expected, simply stir in a bit more heavy cream or chicken broth (1-2 tablespoons at a time) over low heat until you reach your desired consistency. Remember to taste and adjust seasoning as you add!
Can this casserole be made dairy-free?
Absolutely! You can make this Keto Garlic Mushroom Chicken Casserole dairy-free by using coconut cream instead of heavy cream and swapping cream cheese for a dairy-free alternative like cashew cream or nutritional yeast. It will still be rich and creamy, perfect for everyone!

Keto Garlic Mushroom Chicken: Comfort in Every Bite
Ingredients
Equipment
Method
- Preheat the oven to 375°F (190°C).
- In a large skillet over medium heat, sauté minced garlic until fragrant, about 1-2 minutes. Then add the chicken breast and cook for approximately 5-7 minutes on each side until golden brown and cooked through. Transfer the chicken to a plate to rest briefly.
- In the same skillet, add sliced mushrooms and cook for about 4-5 minutes, stirring occasionally until softened. Set aside with the chicken.
- Reduce heat to low, return the chicken and mushrooms to the skillet, pour in heavy cream, and add cream cheese. Stir gently for about 3-4 minutes until smooth and creamy.
- Mix in shredded cheddar cheese, salt, pepper, and Italian seasoning until well incorporated and the cheese has melted.
- Pour the mixture into a pre-prepared casserole dish, spreading it evenly.
- Bake in the preheated oven for 20-25 minutes until bubbly and golden.
- Remove from oven and allow to cool for about 5-10 minutes before serving.

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