Chicken Spinach Mushroom Casserole

Featured in: Everyday Dinners

This creamy and cheesy chicken bake combines tender chicken breast with fresh spinach and sautéed mushrooms. Cooked in a rich blend of mozzarella, parmesan, and heavy cream, it creates a flavorful, protein-packed dish that’s easy to prepare and perfect for weeknight dinners. The combination of Italian seasoning and garlic enhances the taste, while baking yields a golden, bubbly topping. This low-carb casserole reheats well, making it ideal for meal prep and leftovers.

Updated on Fri, 13 Feb 2026 08:47:14 GMT
Creamy chicken, spinach, and mushroom casserole with melted mozzarella and parmesan cheese in a low-carb oven dish. Pin It
Creamy chicken, spinach, and mushroom casserole with melted mozzarella and parmesan cheese in a low-carb oven dish. | rapidtongs.com

There's something incredibly comforting about a bubbling casserole fresh from the oven, especially one that combines tender chicken, earthy mushrooms, and vibrant spinach in a creamy, cheesy embrace. This Chicken Spinach & Mushroom Low Carb Oven Dish delivers all the satisfaction of comfort food without the carb overload, making it perfect for those mindful of their carbohydrate intake but unwilling to compromise on flavor.

Creamy chicken, spinach, and mushroom casserole with melted mozzarella and parmesan cheese in a low-carb oven dish. Pin It
Creamy chicken, spinach, and mushroom casserole with melted mozzarella and parmesan cheese in a low-carb oven dish. | rapidtongs.com

The magic of this dish lies in its layers - juicy chicken on the bottom, a savory vegetable medley in the middle, and a golden crown of melted cheese on top. As it bakes, the heavy cream creates a silky sauce that binds everything together, while Italian seasoning adds an aromatic dimension that will have everyone asking for seconds.

Ingredients

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  • 2 cups cooked chicken breast, chopped or shredded
  • 4 cups fresh spinach
  • 2 cups mushrooms, sliced
  • 1 small onion, finely chopped
  • 3 cloves garlic, minced
  • 1 cup mozzarella cheese, shredded
  • 1/4 cup parmesan cheese, grated
  • 1/2 cup heavy cream
  • 2 tablespoons olive oil
  • 1 teaspoon Italian seasoning
  • Salt and pepper, to taste

Instructions

Prepare the oven and dish
Preheat oven to 375°F (190°C). Lightly grease a 9×13 inch (23×33 cm) casserole dish.
Sauté the vegetables
In a large skillet, heat olive oil over medium heat. Add onions and mushrooms; sauté for 5–7 minutes until soft and lightly browned.
Add aromatics
Add garlic and cook for 1 minute until fragrant.
Incorporate greens and seasonings
Stir in spinach and cook until wilted. Season the mixture with salt, pepper, and Italian seasoning.
Layer the casserole
Spread the cooked chicken evenly across the bottom of the prepared casserole dish. Layer the sautéed mushroom, spinach, and onion mixture over the chicken.
Add dairy components
Drizzle heavy cream evenly over the top. Sprinkle mozzarella and parmesan cheese over the entire dish.
Bake to perfection
Bake uncovered for 20–25 minutes, or until the cheese is melted and golden brown.
Rest before serving
Remove from oven and let rest for 5 minutes before serving.

Zusatztipps für die Zubereitung

For best results, make sure to cook off any excess moisture from the mushrooms and spinach during the sautéing process. This prevents a watery casserole and ensures a creamy, thick consistency. If you prefer more sauce, you can increase the heavy cream to 3/4 cup, though this will add some additional fat and calories to the dish.

Varianten und Anpassungen

This versatile dish welcomes many adaptations while keeping its low-carb profile. Try adding sun-dried tomatoes for a tangy twist, or swap in different cheeses like Gruyère or provolone for varied flavor profiles. For a spicier version, incorporate red pepper flakes as suggested in the notes. Those who enjoy herbs can add fresh thyme or rosemary to the sautéed vegetables for an aromatic boost.

Serviervorschläge

Serve this casserole hot from the oven alongside a simple green salad dressed with lemon and olive oil for a complete meal. If you're feeding guests who aren't following a low-carb diet, a side of crusty bread makes a nice addition for sopping up the creamy sauce. For a special occasion, pair with a glass of dry white wine like Chardonnay or Pinot Grigio.

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| rapidtongs.com

With just 6g of carbs per generous serving, this Chicken Spinach & Mushroom Low Carb Oven Dish proves that nutritious eating doesn't mean sacrificing flavor or satisfaction. It's a perfect example of how a few quality ingredients, properly prepared, can create a memorable meal that nourishes body and soul. Whether you're following a specific dietary regimen or simply looking for a delicious dinner option, this versatile casserole deserves a regular spot in your meal rotation.

Your Questions Answered

Can I use rotisserie chicken for this dish?

Yes, rotisserie chicken provides a convenient and flavorful option that works well in this creamy bake.

How should I prepare the vegetables before baking?

Sauté the onions, mushrooms, garlic, and spinach until soft and fragrant to reduce moisture and intensify flavors.

Is it possible to make this dish spicier?

Adding red pepper flakes during the sauté step can give the dish a pleasant spicy kick.

What is the best way to store leftovers?

Store leftovers in an airtight container in the refrigerator; they stay fresh for up to 4 days.

Can I substitute the cheeses used in the dish?

While mozzarella and parmesan provide the best melt and flavor, you can try similar dairy options, keeping in mind the changes in texture and taste.

How do I prevent the casserole from becoming watery?

Ensure mushrooms and spinach are sautéed thoroughly to remove excess moisture before layering in the dish.

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Chicken Spinach Mushroom Casserole

A creamy and cheesy chicken bake with spinach, mushrooms, and rich cheeses for a satisfying low-carb meal.

Prep Duration
15 minutes
Cook Duration
25 minutes
Complete Time
40 minutes
Created by Lily Turner


Skill Level Needed Easy

Cuisine Style American

Makes 4 Portions

Diet Preferences No Gluten, Low Carb

What You'll Need

Proteins

01 2 cups cooked chicken breast, chopped or shredded

Vegetables

01 4 cups fresh spinach
02 2 cups mushrooms, sliced
03 1 small onion, finely chopped
04 3 cloves garlic, minced

Dairy

01 1 cup mozzarella cheese, shredded
02 1/4 cup parmesan cheese, grated
03 1/2 cup heavy cream

Oils & Seasonings

01 2 tablespoons olive oil
02 1 teaspoon Italian seasoning
03 Salt and pepper to taste

How-To Steps

Step 01

Prepare casserole dish: Preheat oven to 375°F. Lightly grease a 9x13 inch casserole dish.

Step 02

Sauté vegetables: Heat olive oil in a large skillet over medium heat. Add onions and mushrooms, sauté for 5-7 minutes until soft and lightly browned.

Step 03

Add aromatics: Add minced garlic and cook for 1 minute until fragrant.

Step 04

Wilt spinach: Stir in spinach and cook until wilted. Season the mixture with salt, pepper, and Italian seasoning.

Step 05

Layer chicken: Spread cooked chicken evenly across the bottom of the prepared casserole dish.

Step 06

Add vegetable mixture: Layer the sautéed mushroom, spinach, and onion mixture over the chicken.

Step 07

Add cream: Drizzle heavy cream evenly over the top.

Step 08

Top with cheese: Sprinkle mozzarella and parmesan cheese over the entire dish.

Step 09

Bake casserole: Bake uncovered for 20-25 minutes until the cheese is melted and golden brown.

Step 10

Rest and serve: Remove from oven and let rest for 5 minutes before serving.

What You'll Need

  • Large skillet
  • 9x13 inch casserole dish
  • Chef's knife
  • Cutting board
  • Mixing spoon
  • Measuring cups and spoons

Allergy Alerts

Always review every item for allergens. If unsure, talk to a healthcare expert.
  • Contains dairy including mozzarella, parmesan, and heavy cream
  • Contains possible traces of lactose
  • Gluten-free only if all ingredients are certified gluten-free

Nutrition Info (per serving)

Use these numbers as a helpful reference, not as personal health advice.
  • Calorie Count: 390
  • Fat Content: 26 g
  • Carbohydrates: 6 g
  • Protein Amount: 32 g

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