Keto Garlic Mushroom Chicken Casserole Recipe tastes rich, garlicky, and creamy, with tender chicken and savory mushrooms in every bite. It suits low carb eaters, busy parents, and anyone craving a cozy dinner in about 45 minutes. I first made it on a rainy Tuesday, and my kids asked for seconds.
Why Keto Garlic Mushroom Chicken Casserole Recipe Is Worth It
Keto Garlic Mushroom Chicken Casserole Recipe gives you weeknight comfort with weekend flavor. You sear juicy chicken, fold it into a garlicky mushroom cream sauce, and bake until it bubbles like a little symphony.
The dish packs solid protein, low carbs, and big flavor. You can prep it in one oven-safe skillet, which keeps cleanup easy and sanity intact.
“Creamy, garlicky, and restaurant-level satisfying, this low carb chicken casserole earned a spot in our weekly rotation.” ★★★★★
Ingredients You Need
- 2 pounds boneless, skinless chicken thighs or breasts, cut into 1-inch pieces
- Pantry shortcut: use pre-cooked rotisserie chicken, shredded, about 5 cups packed
- 1 teaspoon fine sea salt, plus more to taste
- 1/2 teaspoon black pepper
- 1 teaspoon smoked paprika
- 1 teaspoon dried thyme or 1 tablespoon fresh thyme leaves
- 1 tablespoon olive oil or avocado oil
- 2 tablespoons butter or ghee
- 10 ounces cremini or button mushrooms, sliced
- Shortcut: buy pre-sliced mushrooms
- 1 small yellow onion, diced
- 6 cloves garlic, minced
- Shortcut: jarred minced garlic works in a pinch
- 1/2 cup chicken broth
- 4 ounces cream cheese, softened and cubed
- Brand note: Philadelphia softens smoothly
- 3/4 cup heavy cream
- Dairy-free swap: use full-fat coconut cream
- 1/2 cup grated Parmesan
- Brand note: a real wedge beats the green can on melt and flavor
- 1 cup shredded mozzarella
- 2 tablespoons chopped fresh parsley
- Optional: 1/4 teaspoon xanthan gum to thicken if you want an extra clingy sauce
- Optional add-ins: 2 cups baby spinach, rough-chopped sun-dried tomatoes, or cooked bacon bits
Equipment
- 12-inch oven-safe skillet or Dutch oven, or a large skillet plus a 9×13 casserole dish
- Cutting board and chef’s knife
- Wooden spoon or spatula
- Instant-read thermometer
- Measuring cups and spoons
Quick Tips & substitutions
- Pat the chicken dry so it browns fast and keeps a juicy bite.
- Use thighs if you want maximum tenderness; use breasts if you prefer leaner macros.
- Brown the chicken in batches to avoid steaming and to build fond for the sauce.
- Warm the cream cheese a bit so it melts into the sauce without lumps.
- Want a thicker sauce without carbs? Sprinkle xanthan gum while whisking and cook 30 seconds.
- No fresh mushrooms handy? Use canned mushrooms, drained well, then sauté only 1 to 2 minutes.
- Dairy-free route: coconut cream plus 2 tablespoons nutritional yeast and extra salt.
- Short on time? Skip the bake, melt mozzarella on top under the broiler for 2 to 3 minutes.
- Add spinach near the end of the sauce step so it wilts but stays bright.
- Meal prep move: double the recipe, bake in two pans, and freeze one for a future dinner win.
How to Make Keto Garlic Mushroom Chicken Casserole Recipe
Prep and season the chicken – 5 minutes
- Preheat the oven to 400°F.
- Toss chicken with salt, pepper, smoked paprika, and thyme.
Sear the chicken – 6 to 8 minutes
- Heat oil and butter in an oven-safe skillet over medium-high heat.
- Sear chicken in two batches until golden on the edges and about 80 percent cooked. Transfer to a bowl.
Sauté mushrooms and aromatics – 5 to 6 minutes
- Add mushrooms and onion to the same skillet. Cook until the mushrooms release moisture and take on color.
- Stir in garlic and cook 30 to 60 seconds until fragrant.
Make the garlic cream sauce – 4 to 5 minutes
- Pour in chicken broth and scrape up the browned bits.
- Reduce heat to medium-low. Whisk in cream cheese until smooth, then stir in heavy cream and Parmesan.
- Simmer 1 to 2 minutes until the sauce lightly coats a spoon. Season to taste.
- If you want it thicker, sprinkle in xanthan gum while whisking and cook 30 seconds.
Assemble and bake – 15 minutes
- Return chicken and any juices to the skillet and fold to coat in sauce. Stir in spinach now if using.
- Top with mozzarella.
- Bake 12 to 15 minutes until bubbly and the chicken hits 165°F in the thickest piece.
Rest and garnish – 5 minutes
- Let the casserole rest 5 minutes so the sauce settles.
- Shower with chopped parsley and serve hot.
Variations
- Bacon ranch: add 1/2 cup cooked bacon bits and 1 tablespoon dry ranch seasoning.
- Jalapeño popper: fold in 2 chopped jalapeños and 2 ounces extra cream cheese, top with crushed pork rinds.
- Tuscan style: add 1/3 cup chopped sun-dried tomatoes and 1 teaspoon Italian seasoning.
- Spinach artichoke: stir in 1 cup chopped marinated artichokes and 2 cups spinach.
- Broccoli cheddar: swap mozzarella for sharp cheddar and add 2 cups steamed broccoli florets.
- Dairy-free: use coconut cream, olive oil, and nutritional yeast in place of Parmesan.
Ways to Serve
- Spoon over cauliflower rice or mashed cauliflower for a cozy low carb bowl.
- Pair with roasted green beans, air fryer asparagus, or a simple arugula salad.
- Add a side of zoodles or spaghetti squash for extra veggies.
- Wine pairing: chardonnay or pinot noir. Non-alcoholic: lemon sparkling water.
Storage
Cool leftovers to room temp within 90 minutes, then store them in airtight containers. Refrigerate up to 4 days. Reheat covered at 325°F for 12 to 15 minutes or microwave in short bursts, stirring so the sauce stays smooth. Freeze up to 3 months in freezer-safe containers, thaw overnight in the fridge, then reheat gently to keep the chicken juicy.
Keto Garlic Mushroom Chicken Casserole Recipe
Keto Garlic Mushroom Chicken Casserole tastes rich, garlicky, and creamy, with tender chicken and savory mushrooms in every bite. It suits low carb eaters, busy parents, and anyone craving a cozy dinner in about 45 minutes.
Ingredients
Instructions
- Preheat the oven to 400°F (200°C).
- In a bowl, toss the chicken pieces with salt, black pepper, smoked paprika, and thyme until evenly coated.
- Heat the olive oil and butter in a 12-inch oven-safe skillet over medium-high heat.
- Sear the chicken in two batches until golden on the edges and about 80 percent cooked through, then transfer the chicken to a bowl and set aside.
- Add the sliced mushrooms and diced onion to the same skillet. Cook, stirring occasionally, until the mushrooms release their moisture and begin to brown.
- Stir in the minced garlic and cook for 30 to 60 seconds, just until fragrant.
- Pour in the chicken broth and scrape up any browned bits from the bottom of the pan.
- Reduce the heat to medium-low. Whisk in the cream cheese until smooth, then stir in the heavy cream and grated Parmesan. Simmer for 1 to 2 minutes, until the sauce lightly coats the back of a spoon. Adjust seasoning with additional salt and pepper if needed.
- If you prefer a thicker sauce, sprinkle in the xanthan gum while whisking and cook for about 30 seconds until slightly thickened.
- Return the seared chicken and any accumulated juices to the skillet, folding to coat the chicken in the garlic mushroom cream sauce. If using spinach or other add-ins, stir them in now.
- Sprinkle the shredded mozzarella evenly over the top of the casserole.
- Transfer the skillet to the oven and bake for 12 to 15 minutes, or until the casserole is bubbly and the chicken reaches an internal temperature of 165°F (74°C).
- Remove from the oven and let the casserole rest for about 5 minutes so the sauce can settle.
- Garnish with chopped fresh parsley and serve hot.
Notes
Nutrition Information
Approximate per serving (6 servings): 480 calories; fat 34 g; saturated fat 17 g; carbohydrates 6 g; fiber 1 g; sugars 3 g; protein 38 g; sodium 540 mg. Values will vary based on specific ingredients, optional add-ins, and portion size.
Approximate per serving (6 servings): 480 calories; fat 34 g; saturated fat 17 g; carbohydrates 6 g; fiber 1 g; sugars 3 g; protein 38 g; sodium 540 mg. Values will vary based on specific ingredients, optional add-ins, and portion size.