Irresistible Keto Garlic Mushroom Chicken Casserole : A Creamy Low-Carb Dinner Favorite

If you’re craving something warm, comforting, and keto-friendly, this Keto Garlic Mushroom Chicken Casserole will quickly become a weeknight favorite. It’s packed with juicy chicken, earthy mushrooms, and a rich garlic cream sauce that feels indulgent without breaking your macros.

This dish combines everything you love about hearty casseroles with the ease and simplicity of low-carb cooking. Whether you’re following a strict keto plan or simply looking for good low-carb meals for dinner, this casserole delivers both flavor and nutrition in every bite.

If you enjoy cozy one-pan dinners, don’t miss other favorites like Keto Meatball Parmesan Casserole and the flavorful Garlic Parmesan Chicken Skewers.

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Why You’ll Love This Keto Creamy Chicken and Mushroom Casserole

There’s something irresistible about the combination of tender chicken and buttery mushrooms smothered in a garlicky, cheesy sauce. This dish hits all the right notes — it’s creamy, savory, and satisfying while staying low in carbs.

Here’s why this recipe deserves a permanent spot in your keto meal rotation:

• Low-carb and high-protein: Perfect for keto or gluten-free lifestyles.
• Quick and easy: Comes together in under an hour with simple ingredients.
• Comforting and family-friendly: Everyone at the table will love it, not just keto eaters.
• Meal-prep friendly: Stores and reheats beautifully for busy weeknights.

If you’re a fan of Keto Chicken Dishes for Dinner, you’ll also love the creamy and protein-packed Cottage Cheese Egg Bake or the flavorful Garlic Herb Chicken Skewers.

Ingredients for Keto Garlic Mushroom Chicken Casserole

This keto-friendly casserole uses simple ingredients that pack big flavor without extra carbs.

For the Chicken and Sauce:

• 4 boneless, skinless chicken breasts (or thighs for juicier texture)
• 2 tablespoons olive oil or butter
• 8 oz (225g) cremini or button mushrooms, sliced
• 3 cloves garlic, minced
• 1 cup (240ml) heavy cream
• ½ cup (120ml) chicken broth
• ½ cup (50g) shredded mozzarella cheese
• ¼ cup (25g) grated Parmesan cheese
• 1 teaspoon Dijon mustard (optional, for depth)
• ½ teaspoon smoked paprika
• Salt and pepper to taste
• 1 tablespoon chopped fresh parsley (for garnish)

If you want to make it dairy-free, you can swap the cream for full-fat coconut milk and use nutritional yeast instead of cheese.

Pair this with sides like Garlic Herb Roasted Potatoes, Carrots, and Zucchini for non-keto guests or a crisp green salad to keep it low-carb.

Kitchen Tools You’ll Need

To make this Keto Dinner Casserole, gather the following tools:

• Large oven-safe skillet or casserole dish
• Sharp knife and cutting board
• Measuring cups and spoons
• Whisk
• Spatula
• Oven mitts

Having a sturdy skillet is key for searing the chicken and creating that flavorful browned base. If you enjoy similar skillet-style dinners, try the Creamy Mushroom Pasta for a cozy night in.

Step-by-Step: How to Make Keto Garlic Mushroom Chicken Casserole

Step 1: Preheat and Prepare
Preheat your oven to 375°F (190°C). Season chicken with salt, pepper, and paprika on both sides.

Step 2: Sear the Chicken
Heat olive oil or butter in a large skillet over medium-high heat. Sear chicken for 4–5 minutes per side, until golden brown. Remove and set aside. (It doesn’t need to be fully cooked — it will finish in the oven.)

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Step 3: Sauté the Mushrooms and Garlic
In the same skillet, add sliced mushrooms. Cook for 5–6 minutes until tender and golden. Stir in minced garlic and cook for another 30 seconds until fragrant.

Step 4: Make the Creamy Sauce
Lower the heat to medium. Add heavy cream, chicken broth, Dijon mustard, and half of the Parmesan. Whisk until smooth and slightly thickened. Taste and adjust seasoning.

Step 5: Assemble the Casserole
Return the seared chicken to the skillet, spooning sauce and mushrooms over the top. Sprinkle mozzarella and the remaining Parmesan evenly across the dish.

Step 6: Bake and Serve
Transfer to the oven and bake for 20–25 minutes, until the chicken is fully cooked and the sauce is bubbling. Garnish with chopped parsley before serving.

If you love creamy comfort meals like this, you’ll also adore the Cheesy Root Vegetable Gratin, which pairs beautifully with this dish for guests who aren’t following keto.

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Pro Tips for the Best Keto Chicken Dinner

• Use a mix of mushrooms: Combining cremini, shiitake, and button mushrooms enhances depth.
• Don’t overcook the chicken: Bake until just done to keep it juicy.
• Let it rest: Allow 5 minutes before serving so the sauce thickens and the flavors meld.
• Add spinach or kale: For extra nutrients and color without raising the carb count.

If you love adding veggies to casseroles, you’ll find inspiration in the Vegetable Casserole — another comforting, crowd-pleasing bake.

Common Mistakes to Avoid

Even the simplest casseroles can go wrong without a few careful steps:

• Watery mushrooms: Always sauté until their moisture evaporates.
• Curdled sauce: Don’t boil the cream — keep it on low heat.
• Overbaked chicken: Check internal temperature; 165°F (74°C) is perfect.
• Skimping on seasoning: Mushrooms and cream need generous salt and pepper for balance.

If you prefer a foolproof, family-style bake, try the Crack Breakfast Casserole, which is both creamy and full of protein.

Serving and Presentation Ideas

This Keto Garlic Mushroom Chicken Casserole looks as good as it tastes. Serve it straight from the skillet for a rustic, elegant presentation. Garnish with parsley or thyme sprigs for a restaurant-worthy look.

Serve it with these low-carb sides for a complete meal:

• Zucchini noodles or cauliflower rice
• Garlic sautéed spinach
• Cucumber Dill Salad (try it here)
• Roasted asparagus or broccoli

For an impressive dinner table, pair it with Lavender Lemonade or Cucumber Mint Agua Fresca for a fresh, non-alcoholic beverage option.

Recipe Variations (Keto, Gluten-Free, Dairy-Free Options)

• Keto-friendly: Stick with full-fat cream and cheese to keep macros in check.
• Gluten-free: Use homemade chicken broth or verify that store-bought broth is gluten-free.
• Dairy-free: Use coconut cream and vegan cheese alternatives.
• Spicy version: Add red pepper flakes or a spoonful of keto-friendly hot sauce.
• Extra creamy: Mix in a spoon of cream cheese or mascarpone before baking.

For another variation, try the elegant Cranberry Brie Stuffed Chicken, which blends sweet and savory for a holiday-worthy dinner.

Meal Prep, Storage, and Reheating Tips

This dish is perfect for meal prepping or storing leftovers.

• Refrigerate: Store in an airtight container for up to 4 days.
• Freeze: Let cool completely, then freeze in meal-sized portions for up to 2 months.
• Reheat: Warm gently in the oven at 325°F (160°C) for 10–15 minutes or microwave on low for 1–2 minutes.

It’s an ideal meal to batch cook alongside others like the One-Pan Ground Chicken Casserole or Vegetarian Pasta Primavera.

Healthy Sides and Pairings for Keto Dinner

Enhance your dinner table with these low-carb pairings that complement the rich flavors of this casserole:

• Garlicky Kale with White Beans and Lemon
• Cheese-Stuffed Mini Peppers
• Sweet Chili Sauce for dipping veggies
• Garlic Butter Corn with Melty Cheese for a comforting side

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FAQs About Keto Garlic Mushroom Chicken Casserole

Can I use chicken thighs instead of breasts?
Absolutely! Thighs are juicier and hold up well in the creamy sauce.

Can I make this ahead of time?
Yes — assemble and refrigerate before baking. Add 5 extra minutes of cooking time if baking from cold.

Can I add more vegetables?
Yes, spinach, kale, zucchini, or broccoli all work beautifully.

Can I make it dairy-free?
Use coconut cream and dairy-free cheese alternatives.

Is this casserole freezer-friendly?
It freezes very well for up to 2 months — just cool completely before storing.

Why This Recipe Belongs in Your Keto Rotation

This Keto Garlic Mushroom Chicken Casserole combines creamy indulgence with guilt-free eating. It’s the kind of dish that proves keto cooking can be both satisfying and simple. With every bite, you’ll enjoy tender chicken, garlicky mushrooms, and a luscious sauce that tastes far richer than its carb count allows.

Whether it’s a cozy weeknight or a dinner party with friends, this casserole delivers elegance and flavor with minimal effort. For even more delicious Keto Dinner Recipes, explore Lyndy’s Kitchen favorites like Keto Meatball Parmesan Casserole and Creamy Mushroom Pasta.

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