Why You’ll Love This Recipe

Creamy, cheesy, and comforting
Made in one baking dish
Perfect for family dinners
Nutty Gruyère cheese adds incredible flavor
Great make-ahead meal
Packed with chicken, rice, and mushrooms
Excellent for leftovers
Easy enough for weeknight cooking

Ingredients

(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)

For the Casserole

2 cups cooked chicken, shredded or diced
1 cup uncooked long-grain white rice
12 ounces baby bella or cremini mushrooms, sliced
1 small onion, diced
3 cloves garlic, minced
2 tablespoons unsalted butter
2 tablespoons olive oil
2½ cups chicken broth
1 cup whole milk
1 teaspoon dried thyme
1 teaspoon salt
½ teaspoon black pepper

For the Cheese Layer

1½ cups Gruyère cheese, shredded
¼ cup Parmesan cheese, grated

For Garnish

Fresh parsley, chopped

Directions

Preheat the oven to 375°F (190°C).
Lightly grease a 9×13-inch baking dish.
Heat the olive oil and butter in a large skillet over medium heat.
Add the onion and cook for 3–4 minutes until softened.
Stir in the mushrooms and cook for 6–8 minutes until browned.
Add the garlic and cook for 30 seconds until fragrant.
Remove the skillet from the heat.
In a large bowl, combine the uncooked rice, cooked chicken, mushroom mixture, chicken broth, milk, thyme, salt, and black pepper.
Stir in 1 cup of the Gruyère cheese.
Transfer the mixture to the prepared baking dish.
Cover tightly with aluminum foil.
Bake for 45 minutes.
Remove the foil and sprinkle the remaining Gruyère and Parmesan cheese over the top.
Return to the oven and bake uncovered for 15–20 minutes until the rice is tender and the cheese is golden and bubbly.
Let the casserole rest for 10 minutes before serving.
Garnish with fresh parsley.

Servings and Timing

Servings: 6
Prep Time: 20 minutes
Cook Time: 60–65 minutes
Rest Time: 10 minutes
Total Time: Approximately 1 hour 35 minutes

Variations

Wild Rice Casserole: Substitute wild rice for a heartier texture.
Broccoli Chicken Casserole: Add steamed broccoli florets.
Spinach Mushroom Version: Stir in fresh spinach before baking.
Bacon Gruyère Casserole: Add cooked crumbled bacon.
Turkey and Rice Casserole: Replace the chicken with cooked turkey.
Herb-Rich Casserole: Add rosemary, sage, and parsley.
Extra Cheesy Version: Include mozzarella or fontina cheese with the Gruyère.

Storage/Reheating

Storage

Store leftovers in an airtight container in the refrigerator for up to 4 days.

Freezing

Freeze the cooled casserole in freezer-safe containers for up to 3 months.

Reheating

Reheat covered in a 350°F (175°C) oven for 20–25 minutes or microwave individual portions until heated through.

FAQs

What is Gruyère cheese?

Gruyère is a Swiss cheese known for its nutty, slightly sweet flavor and excellent melting qualities.

Can I use rotisserie chicken?

Yes. Rotisserie chicken is a convenient and flavorful option.

What mushrooms work best?

Baby bella, cremini, white button, or mixed mushrooms all work well.

Can I use brown rice?

Yes, but the cooking time and liquid amount may need adjustment.

Why cover the casserole while baking?

Covering helps the rice cook evenly by trapping moisture.

Can I prepare this casserole ahead of time?

Yes. Assemble it a day ahead and refrigerate until ready to bake.

What can I substitute for Gruyère?

Swiss cheese, fontina, or a mild white cheddar are good alternatives.

How do I know when the casserole is done?

The rice should be tender, and the liquid should be absorbed.

Can I add more vegetables?

Absolutely. Broccoli, peas, spinach, and carrots are excellent additions.

What should I serve with this casserole?

A green salad, roasted vegetables, or crusty bread pair beautifully with it.

Conclusion

Mushroom Gruyère Chicken and Rice Casserole is the ultimate comfort food, combining tender chicken, savory mushrooms, creamy rice, and rich melted cheese in one satisfying dish. Easy to prepare and packed with flavor, it’s perfect for family dinners, meal prep, and special gatherings alike. With its cozy texture and irresistible cheesy topping, this casserole is sure to become a regular favorite at your table.

Mushroom Gruyere Chicken and Rice Casserole

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Mushroom Gruyère Chicken and Rice Casserole is a rich and comforting one-dish meal featuring tender chicken, earthy mushrooms, fluffy rice, and nutty Gruyère cheese baked in a creamy sauce. Perfect for family dinners and meal prep, this hearty casserole delivers satisfying flavor in every bite.

Author: Laura
Prep Time: 20 minutes
Cook Time: 65 minutes
Total Time: 1 hour 35 minutes
Yield: 6 servings
Category: Main Course
Method: Bake
Cuisine: American
Diet: Halal

Instructions

Preheat the oven to 375°F (190°C).
Lightly grease a 9×13-inch baking dish.
Heat the olive oil and butter in a large skillet over medium heat.
Add the onion and cook for 3–4 minutes until softened.
Stir in the mushrooms and cook for 6–8 minutes until browned.
Add the garlic and cook for 30 seconds until fragrant.
Remove the skillet from the heat.
In a large bowl, combine the uncooked rice, cooked chicken, mushroom mixture, chicken broth, milk, thyme, salt, and black pepper.
Stir in 1 cup of the Gruyère cheese.
Transfer the mixture to the prepared baking dish.
Cover tightly with aluminum foil.
Bake for 45 minutes.
Remove the foil and sprinkle the remaining Gruyère and Parmesan cheese over the top.
Return to the oven and bake uncovered for 15–20 minutes until the rice is tender and the cheese is golden and bubbly.
Let the casserole rest for 10 minutes before serving.
Garnish with fresh parsley.

Notes

Rotisserie chicken works wonderfully and saves preparation time.
Gruyère may be substituted with Swiss cheese, fontina, or mild white cheddar.
Covering the casserole ensures the rice cooks evenly and absorbs the liquid properly.
Add broccoli, spinach, peas, or carrots for extra vegetables.
Prepare the casserole up to one day ahead and refrigerate before baking.
Allow the casserole to rest before serving for the best texture.

Nutrition

Serving Size: 1 serving
Calories: 560 kcal
Sugar: 5 g
Sodium: 840 mg
Fat: 25 g
Saturated Fat: 12 g
Unsaturated Fat: 10 g
Trans Fat: 0 g
Carbohydrates: 42 g
Fiber: 2 g
Protein: 39 g
Cholesterol: 105 mg