Can I use chicken thighs instead of chicken breast?

Absolutely. Cooked chicken thighs are juicy and work beautifully in Keto Garlic Mushroom Chicken Casserole . If anything, they make it even more flavorful.

What mushrooms work best?

Button and cremini are perfect, but you can use whatever you have. If you use larger mushrooms (like portobello), slice them thin so they cook evenly.

Can I make this casserole ahead of time?

Yes! Assemble everything, cover, and refrigerate for up to 24 hours . Bake when ready. You may need to add a few extra minutes since it’ll be cold going in.

How do I store leftovers?

Store in an airtight container in the fridge for 3–4 days . Reheat in the microwave or oven until warmed through.

You can, but creamy casseroles sometimes change texture slightly after freezing. If you do freeze, thaw overnight in the fridge and reheat gently.

4 Tasty Easy Keto Garlic Mushroom Chicken Casserole

Description

Creamy, cheesy Keto Garlic Mushroom Chicken Casserole loaded with garlicky mushrooms and tender chicken—an easy, cozy low-carb dinner the whole table will love.

Ingredients

Scale

2 cups cooked chicken, shredded or diced
8 ounces mushrooms, sliced (button or cremini)
4 cloves garlic, minced
1 cup heavy cream
1 cup shredded mozzarella cheese
1/2 cup grated Parmesan cheese
1 tablespoon olive oil
1 teaspoon dried thyme
1 teaspoon dried oregano
Salt and pepper, to taste
Fresh parsley, chopped (for garnish)

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Instructions

Preheat oven to 375°F (190°C) and lightly grease a 9×13-inch casserole dish.
Heat olive oil in a large skillet over medium heat. Add mushrooms and sauté 5–7 minutes until golden and most moisture cooks off.
Add garlic and cook 1–2 minutes, stirring often, until fragrant (don’t let it burn).
In a large bowl, mix chicken, sautéed mushrooms/garlic, heavy cream, thyme, oregano, salt, and pepper.
Spread mixture evenly into the prepared casserole dish.
Top with mozzarella and Parmesan.
Bake 25–30 minutes until bubbly and golden.
Rest 5 minutes, garnish with parsley, and serve hot.

Notes

Best texture tip: Sauté mushrooms until most liquid is gone—this keeps the casserole creamy, not watery.

Chicken shortcut: Rotisserie chicken works perfectly here.

Make-ahead: Assemble, cover, and refrigerate up to 24 hours. Add 5–10 minutes to bake time if cold.

Storage: Refrigerate leftovers in an airtight container 3–4 days. Reheat gently (microwave or oven).

Freezing: Creamy casseroles can change texture slightly after freezing, but it still works. Thaw overnight in the fridge before reheating.

Prep Time: 10 minutes
Cook Time: 30 minutes
Category: Dinner (Casserole)
Method: Baking
Cuisine: American

Nutrition

Serving Size: 1/8 of casserole
Calories: 250 Kcal
Sugar: 1 g
Sodium: 250 mg
Fat: 19 g
Saturated Fat: 11 g
Unsaturated Fat: 8 g
Trans Fat: 0 g
Carbohydrates: 3 g
Fiber: 0 g
Protein: 18 g
Cholesterol: 85 mg