Can I use fresh chicken instead of cooked?

Absolutely. If you want to use fresh chicken, simply cut about 1.5 pounds of boneless, skinless chicken breasts or thighs into bite-sized pieces. Season them with salt and pepper, then cook them in the skillet before you sauté the mushrooms. Once the chicken is cooked through, remove it from the skillet and set it aside, then proceed with the recipe as written, adding the cooked chicken back in at the end.

What if I can’t have dairy?

Making this recipe dairy-free is possible with a few substitutions. You can use a dairy-free cream cheese alternative and full-fat coconut cream or a nut-based cream in place of the heavy cream. For the cheese topping, use your favorite dairy-free shredded cheese blend. The flavor profile will be slightly different, but it will still be a delicious and creamy casserole.

Can I freeze leftovers?

Yes, this casserole freezes very well, making it great for meal prep. Allow the baked casserole to cool completely, then cover it tightly with plastic wrap and aluminum foil or transfer it to a freezer-safe container. It can be frozen for up to 3 months. To reheat, thaw it in the refrigerator overnight and then bake at 350°F until heated through.

How do I store leftovers?

Store any leftovers in an airtight container in the refrigerator. They will stay fresh and delicious for up to 4 days. To reheat, you can microwave individual portions or place the entire casserole dish back in a 350°F oven until it's warmed through. The sauce may thicken slightly in the fridge, but it will become creamy again upon reheating.

Is this recipe gluten-free?

Yes, this recipe is naturally gluten-free. It uses no flour, grains, or gluten-containing binders for thickening the sauce. The main ingredients—chicken, mushrooms, cream, and cheese—are all gluten-free. However, always double-check the labels on your packaged ingredients, such as chicken broth and seasonings, to ensure they are certified gluten-free if you have a severe intolerance or celiac disease.

Keto Garlic Mushroom Chicken Casserole: The Ultimate Recipe 2026 -

Name: The Ultimate Keto Garlic Mushroom Chicken Casserole Recipe
Prep time: 15 min
Cook time: 25 min
Total time: 40 min
Cuisine: American
Ingredients: 4 cups shredded cooked chicken; 16 oz cremini mushrooms, sliced; 4 tbsp unsalted butter; 4–6 cloves garlic, minced; 8 oz cream cheese, softened; 1 cup heavy whipping cream; 1/2 cup chicken broth; 1/2 cup grated Parmesan cheese; 2 cups shredded mozzarella cheese; 1 tsp onion powder; 1 tsp dried parsley; Salt and black pepper to taste; 2 tbsp chopped fresh parsley (optional, for garnish)

Description

A rich, creamy, low-carb comfort food made with shredded chicken, sautéed mushrooms, garlic, and cheese. Perfect for keto weeknight dinners or meal prep.

Ingredients

Scale

4 cups shredded cooked chicken

16 oz cremini mushrooms, sliced

4 tbsp unsalted butter

4–6 cloves garlic, minced

8 oz cream cheese, softened

1 cup heavy whipping cream

1/2 cup chicken broth

1/2 cup grated Parmesan cheese

2 cups shredded mozzarella cheese

1 tsp onion powder

1 tsp dried parsley

Salt and black pepper to taste

2 tbsp chopped fresh parsley (optional, for garnish)

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Instructions

1. Preheat oven to 375°F (190°C) and grease a 9×13 inch casserole dish.

2. In a large skillet, melt butter over medium-high heat. Add mushrooms and sauté until browned and liquid is evaporated, about 7–10 minutes.

3. Add minced garlic and cook for 1 minute until fragrant.

4. Reduce heat to low and add softened cream cheese. Stir until melted and smooth.

5. Gradually whisk in heavy cream and chicken broth until sauce is creamy.

6. Add Parmesan, onion powder, dried parsley, salt, and pepper. Simmer until slightly thickened.

7. Stir in shredded chicken until well coated with sauce.

8. Transfer mixture to the prepared casserole dish and spread evenly.

9. Top with shredded mozzarella cheese.

10. Bake uncovered for 20–25 minutes, until bubbly and golden.

11. Let rest for 5–10 minutes before serving. Garnish with fresh parsley if desired.

Notes

Use rotisserie or leftover chicken for convenience.

Add spinach, cauliflower rice, or steamed broccoli for extra vegetables.

Try other cheeses like Gruyère or Monterey Jack for variety.

Freeze leftovers for up to 3 months; reheat at 350°F until hot.

Dairy-free and gluten-free substitutions are possible—see full notes.

Prep Time: 15 minutes
Cook Time: 25 minutes
Category: Dinner
Method: Baking
Cuisine: American

Nutrition

Serving Size: 1 portion
Calories: 420
Sugar: 2g
Sodium: 510mg
Fat: 33g
Saturated Fat: 18g
Unsaturated Fat: 13g
Trans Fat: 0g
Carbohydrates: 6g
Fiber: 1g
Protein: 29g
Cholesterol: 120mg