Looking for a delicious and comforting meal that fits perfectly into your low-carb lifestyle? The Chicken Spinach and Mushroom Low Carb Casserole is a fantastic option, marrying savory chicken breasts with fresh spinach and hearty mushrooms, all enveloped in a creamy, flavorful sauce. What’s more, this dish is not just low in carbs, but it also delivers on taste and satisfaction, making it ideal for a cozy weeknight dinner or meal prep for the week ahead. Each bite is a delightful combination of textures and flavors, accented by the richness of melted mozzarella cheese. Whether you’re following a keto diet or simply want a nutritious and hearty meal option, this casserole promises to delight.
One of the greatest benefits of this recipe is its flexibility. It’s incredibly simple to prepare and takes about an hour from start to finish – perfect for busy weekdays. Plus, by using ingredients like chicken, spinach, and mushrooms, you’re packing in nutritious elements while keeping the carb count low. This casserole also makes leftovers easy — simply reheat and enjoy another flavorful meal. Trust us, once you try this Chicken Spinach and Mushroom Low Carb Casserole, it will quickly become a family favorite that everyone will be excited to have on the dinner table!
Why You’ll Love This Chicken Spinach and Mushroom Low Carb Casserole
- Delicious and Flavorful: The combination of chicken, spinach, and mushrooms is enhanced by a creamy sauce that tantalizes the taste buds.
- Low Carb and Keto-Friendly: With minimal carbohydrates, this dish fits perfectly into low-carb dietary preferences.
- Easy to Prepare: This one-dish meal is straightforward enough for even beginner cooks, making it an excellent choice for busy days.
- Meal Prep Dream: Prepare in advance for effortless lunches or dinners throughout the week.
- Customizable: Feel free to switch up the veggies or cheese according to your taste preferences!
Preparation Phase & Tools to Use
Before diving into this tantalizing casserole, it’s essential to prepare your kitchen and gather the right tools. Begin by preheating your oven to 375°F (190°C); this ensures that the casserole will cook evenly and thoroughly. A 9×13-inch baking dish is ideal for this recipe, as it provides ample space for the chicken and vegetables while allowing the sauce to envelop each component comfortably. If you don’t have a baking dish of that size, a round casserole dish may work as well.
Make sure to have a skillet on hand for sautéing the mushrooms and spinach; this step enhances the flavors and helps integrate everything beautifully before it hits the oven. An electric mixer or a whisk will help you combine the cream cheese, olive oil, and chicken broth smoothly — your goal is a velvety texture that pours easily over the chicken and vegetables. Finally, keep your measuring cups and spoons handy so you can accurately add the desired amounts of seasoning and ingredients.

Ingredients
- 6 thin-sliced chicken breasts
- 1 container (8 oz) green onion cream cheese
- 1/4 cup olive oil
- 1/2 cup chicken broth
- 1 large package of sliced mushrooms
- 1 small bag of fresh baby spinach
- 1 dash Weber Herb and Garlic Seasoning
- 8 oz shredded mozzarella cheese
- Salt and pepper to taste
Instructions
Step 1: Preheat and Prepare the Dish
Start by preheating your oven to 375°F (190°C). While it warms up, take a 9×13-inch baking dish and lightly grease it to prevent sticking. Arrange the thin-sliced chicken breasts in a single layer within the dish, ensuring they are neat and evenly spaced. This helps with even cooking. Season the chicken generously with salt, pepper, and a dash of Weber Herb and Garlic Seasoning for added flavor. This step is crucial as it sets the foundation for the dish’s taste.
Step 2: Sauté the Vegetables
Next, grab a skillet and heat a splash of olive oil over medium heat. Add the sliced mushrooms to the skillet and sauté them until they soften and release their juices, about 5-7 minutes. This process intensifies their flavor and makes them deliciously tender. Once the mushrooms are cooked, toss in the fresh baby spinach and stir just until it wilts. Remember, the spinach doesn’t need long — just a quick sauté will do, as the residual heat will suffice for cooking it through.
Step 3: Mix the Creamy Sauce
In a mixing bowl, combine the green onion cream cheese, olive oil, and chicken broth. Use an electric mixer or a whisk to blend these ingredients until they reach a smooth consistency. This creamy sauce is what brings the casserole together, coating the chicken, mushrooms, and spinach in rich, delectable flavors.
Step 4: Assemble the Casserole
Once the veggies are ready and the sauce is mixed, it’s time to assemble! Pour the creamy sauce over the seasoned chicken breasts in the prepared baking dish. Then sprinkle the sautéed mushrooms and wilted spinach all over, making sure everything is well-distributed. Cover the dish loosely with aluminum foil to trap moisture and help the chicken cook evenly as it bakes.
Step 5: Bake and Final Touches
Place the covered casserole in the preheated oven and allow it to bake for 20 minutes. After this time, carefully remove the foil and let it bake for an additional 20 minutes. This helps the sauce thicken and yields a juicy chicken. For the final touch, sprinkle the shredded mozzarella cheese atop the casserole and return it to the oven for another 5-10 minutes, or until the cheese is melted and bubbly. The golden brown top adds to the inviting look and taste of the dish.

Variations
- Protein: Substitute chicken with cooked ground turkey or even rotisserie chicken for a quicker prep time.
- Vegetables: Add diced bell peppers, zucchini, or broccoli for added nutrients and color.
- Cheese: Experiment with different cheeses such as provolone, cheddar, or even feta for an eclectic twist.
Cooking Notes
- Using thin-sliced chicken promotes even cooking and helps prevent dryness.
- Ensure you only wilt the spinach for a short time to retain its bright color and nutrients.
- Softening cream cheese beforehand aids in easier blending, creating a lusciously creamy sauce.
- Add a pinch of red pepper flakes for an exciting kick of heat, if desired.
Serving Suggestions
- Serve warm, alongside a fresh garden salad or steamed green beans for a well-rounded meal.
- Pair with a glass of white wine for a delightful dinner experience.
Tips
- Consider preparing the casserole ahead of time and refrigerating it to save time at dinner.
- Be creative with spices; rosemary or thyme can change the flavor profile significantly.
- Pair leftovers with a side of cauliflower rice for an easy, low-carb option!
Prep Time, Cook Time, Total Time
- Prep Time: 10 minutes
- Cook Time: 50 minutes
- Total Time: 1 hour
Nutritional Information
- Calories: 430
- Protein: 38g
- Sodium: 480mg
FAQs
Can I freeze this casserole?
Yes, you can freeze the Chicken Spinach and Mushroom Low Carb Casserole. It’s best to freeze it before baking and wrap it tightly in plastic wrap or place it in an airtight container. Just bake after thawing when you’re ready to eat.
How do I store leftovers?
Leftovers can be stored in an airtight container in the refrigerator for up to 3 days. Reheat in the oven for best results, or microwave until heated through.
Can I use frozen spinach instead of fresh?
Yes, frozen spinach can be used. Just be sure to thaw and drain excess moisture before adding it to the casserole.
What can I serve with this casserole?
This casserole pairs beautifully with a garden salad, roasted vegetables, or low-carb options like cauliflower rice.
Conclusion
The Chicken Spinach and Mushroom Low Carb Casserole is not just a meal; it’s an experience bursting with flavors and nutrients. With its rich, creamy sauce and satisfying ingredients, it serves as a hearty dinner that everyone will enjoy while sticking to their low-carb goals. Encourage your family and friends to give this recipe a try, and don’t hesitate to experiment with variations that customize it to your taste. Whether you’re loading up on vegetables or swapping in different proteins, this casserole is versatile enough to meet any dietary needs. So why wait? Dive into this delightful, wholesome dish and enjoy a comforting meal that proves healthy can be incredibly delicious!
Print
Chicken Spinach and Mushroom Low Carb Casserole
- Total Time: 1 hour
- Yield: 6 servings 1x
Description
The Chicken Spinach and Mushroom Low Carb Casserole is a comforting meal that fits perfectly into your low-carb lifestyle.
Ingredients
- 6 thin-sliced chicken breasts
- 1 container (8 oz) green onion cream cheese
- 1/4 cup olive oil
- 1/2 cup chicken broth
- 1 large package of sliced mushrooms
- 1 small bag of fresh baby spinach
- 1 dash Weber Herb and Garlic Seasoning
- 8 oz shredded mozzarella cheese
- Salt and pepper to taste
Instructions
- Preheat your oven to 375°F (190°C) and arrange the chicken breasts in a baking dish. Season with salt, pepper, and seasoning.
- Sauté mushrooms in olive oil until soft, then add spinach until wilted.
- Mix cream cheese, olive oil, and chicken broth until smooth.
- Assemble the casserole by layering chicken, then adding sauce, mushrooms, and spinach.
- Bake for 20 minutes covered, then uncover and bake an additional 20 minutes. Add cheese and bake until bubbly.
Notes
Using thin-sliced chicken promotes even cooking. Freeze the casserole before baking for future convenience.
- Prep Time: 10 minutes
- Cook Time: 50 minutes
- Category: Dinner
Nutrition
- Calories: 430 kcal
- Sodium: 480 mg
- Protein: 38 g