Easy Creamy Chicken Spinach and Mushroom Low-Carb Casserole

When you’re looking for a wholesome dinner that’s both satisfying and low in carbs, this easy creamy chicken spinach casserole is a total game-changer. It blends tender chicken, fresh spinach, and earthy mushrooms all baked together in a luscious, cheesy sauce. You’ll love how simple it is to whip up yet feels so indulgent.

this Recipe

Whether you’re meal prepping for the week or cooking for family, this chicken spinach casserole is an effortless dish to add to your repertoire. The creamy texture and comforting flavors make it a perfect option any night of the week.

Why You’ll Love This Recipe

• Low-carb and keto-friendly without sacrificing flavor or creaminess.
• Uses simple, wholesome ingredients you likely already have on hand.
• One-dish bake minimizes cleanup and maximizes convenience.
• Rich, creamy sauce that pairs perfectly with tender chicken and mushrooms.
• Versatile recipe that can be easily customized with your favorite veggies or cheese.

Ingredients

Gather these fresh, easy-to-find ingredients for a creamy and delicious chicken spinach casserole.

• 1.5 pounds boneless, skinless chicken breasts, diced
• 4 cups fresh spinach, roughly chopped
• 8 ounces cremini or white mushrooms, sliced
• 1 small yellow onion, finely chopped
• 3 cloves garlic, minced
• 1 cup heavy cream
• 4 ounces cream cheese, softened
• 1 cup shredded mozzarella cheese
• 1/2 cup grated Parmesan cheese
• 2 tablespoons olive oil
• 1 teaspoon dried thyme
• 1/2 teaspoon smoked paprika
• Salt and freshly ground black pepper to taste

Recipe Details

• Prep Time: 15 minutes
• Cook Time: 30 minutes
• Total Time: 45 minutes
• Servings: 6
• Calories: Approximately 320 per serving

How to Make Easy Creamy Chicken Spinach and Mushroom Low-Carb Casserole Recipe

1. Preheat your oven to 375°F and lightly grease a 9×13-inch baking dish.
2. Heat olive oil in a large skillet over medium heat. Add diced chicken and cook until browned and cooked through, about 6-8 minutes. Remove chicken and set aside.
3. In the same skillet, sauté onions and garlic until translucent and fragrant, about 3 minutes. Add sliced mushrooms and cook until they release their juices and soften, about 5 minutes.
4. Reduce heat to low and stir in cream cheese, heavy cream, dried thyme, smoked paprika, salt, and pepper. Stir until the cream cheese melts and the sauce is smooth and creamy.
5. Add the cooked chicken and chopped spinach to the skillet. Stir until spinach wilts and everything is combined evenly.
6. Transfer the mixture to the prepared baking dish. Sprinkle mozzarella and Parmesan cheeses evenly over the top.
7. Bake uncovered for 20-25 minutes, until the cheese is bubbly and golden brown on top.
8. Remove from the oven and let rest for 5 minutes before serving. Garnish with fresh parsley if desired.

Tips for the Best Results

• Use fresh spinach for the best texture and flavor, but you can substitute frozen spinach—just be sure to squeeze out excess liquid.
• Don’t overcook the chicken on the stove; it will continue cooking in the oven and stay juicy.
• Feel free to swap mozzarella for cheddar or pepper jack for a different cheese flavor.
• Let the casserole rest after baking to allow the sauce to thicken slightly for a creamier bite.
• For extra flavor, add a pinch of nutmeg to the creamy sauce or toss in fresh herbs like basil or oregano.

Storage and Reheating

Store any leftovers in an airtight container in the refrigerator for up to 3 days. This casserole reheats beautifully, so it’s perfect for meal prep or easy lunches.

When reheating, warm it in the oven at 350°F for 15-20 minutes or in the microwave until heated through. If it seems a bit dry, add a splash of cream or broth before reheating to restore creaminess.

Frequently Asked Questions

Can I use chicken thighs instead of chicken breasts?

Yes! Chicken thighs will add a bit more richness and stay juicy. Just dice them similarly and adjust cooking time to ensure they’re fully cooked before baking.

Is this recipe suitable for keto diets?

Absolutely. This casserole is low in carbs and high in fat and protein, making it a great keto-friendly option.

Can I make this casserole ahead of time?

Yes, you can assemble the casserole a day ahead and store it covered in the refrigerator. Bake it right before serving, adding a few extra minutes if baking from cold.

What can I serve with this casserole?

This casserole is hearty enough on its own, but you can serve it with a fresh green salad or roasted low-carb vegetables for a complete meal.