Dreamy Creamy Chicken & Spinach Casserole Recipe

On chilly evenings or whenever you’re craving a comforting meal, nothing hits the spot quite like a creamy chicken spinach casserole. This chicken spinach casserole blends tender chicken, vibrant spinach, and a luscious creamy sauce that’s simply irresistible.

this Recipe

Whether you’re cooking for family or preparing ahead for a small gathering, this recipe is easy to follow and delivers big on flavor. You’ll find it’s a go-to dish that’s both satisfying and nourishing, perfect for those cozy nights in.

Why You’ll Love This Recipe

• Rich, creamy texture that feels indulgent but homemade.
• Loaded with wholesome spinach for a nutritious boost.
• Easy to prepare with simple ingredients you likely have on hand.
• Perfect for feeding 6 people comfortably.
• Great for make-ahead meals or leftovers that reheat beautifully.

Ingredients

Gather these ingredients to create your dreamy creamy chicken spinach casserole.

• 3 cups cooked chicken, shredded or diced
• 4 cups fresh spinach, roughly chopped
• 1 cup shredded cheddar cheese
• 1 cup shredded mozzarella cheese
• 2 tablespoons unsalted butter
• 3 cloves garlic, minced
• 1 medium onion, finely chopped
• 3 tablespoons all-purpose flour
• 2 cups whole milk
• 1/2 cup sour cream
• 1/2 teaspoon dried thyme
• 1/2 teaspoon paprika
• 1/4 teaspoon black pepper
• 1/2 teaspoon salt, or to taste
• 1/2 cup grated Parmesan cheese
• Cooking spray for greasing the casserole dish

Recipe Details

• Prep Time: 20 minutes
• Cook Time: 35 minutes
• Total Time: 55 minutes
• Servings: 6
• Calories: Approximately 420 per serving

How to Make Dreamy Creamy Chicken & Spinach Casserole: A Comforting Delight!

1. Preheat your oven to 375°F and lightly grease a 9×13-inch casserole dish with cooking spray.
2. In a large skillet, melt butter over medium heat. Add chopped onion and sauté until translucent, about 4 minutes, then stir in minced garlic and cook for another minute until fragrant.
3. Sprinkle the flour over the onions and garlic, stirring constantly to form a roux. Cook for 2 minutes to eliminate the raw flour taste.
4. Gradually whisk in the milk, continuing to stir until the sauce thickens and becomes creamy, about 5 minutes. Remove from heat and mix in sour cream, dried thyme, paprika, salt, and black pepper.
5. Fold in the cooked chicken, chopped spinach, half of the cheddar, mozzarella, and Parmesan cheeses until everything is well combined.
6. Pour the mixture evenly into the prepared casserole dish. Sprinkle the remaining cheddar and mozzarella cheeses over the top for a golden cheesy crust.
7. Bake uncovered for 30-35 minutes, or until the casserole is bubbly and the cheese on top is melted and golden brown.
8. Let the casserole rest for 5 minutes before serving to allow it to set and cool slightly.

Tips for the Best Results

• Use fresh spinach for a vibrant flavor, but frozen thawed and drained spinach works well too.
• Shred your own cheese for better melt and flavor compared to pre-shredded options.
• Don’t skip the sour cream; it adds tangy creaminess that balances the richness.
• Make sure the chicken is fully cooked before adding to the casserole—leftover roasted or rotisserie chicken works perfectly.
• If you want extra crunch, sprinkle breadcrumbs on top before baking.

Storage and Reheating

Store any leftovers in an airtight container in the refrigerator for up to 4 days. To keep it fresh longer, freeze portions in freezer-safe containers for up to 3 months.

Reheat refrigerated casserole in the oven at 350°F for 15-20 minutes or until warmed through. Frozen portions should thaw overnight in the fridge before reheating the same way for best texture.

Frequently Asked Questions

Can I use frozen spinach instead of fresh?

Yes, frozen spinach is a convenient alternative. Just be sure to thaw it completely and squeeze out excess moisture before adding it to prevent a watery casserole.

What types of cheese work best in this casserole?

Cheddar and mozzarella provide great flavor and meltability, while Parmesan adds a nice savory note. You can experiment with Swiss or Monterey Jack for different tastes.

Is this casserole freezer-friendly?

Absolutely. This casserole freezes well in airtight containers. For best results, thaw it in the refrigerator overnight before reheating in the oven.

Can I make this recipe vegetarian?

Yes, simply omit the chicken and add extra spinach, mushrooms, or your favorite vegetables to maintain heartiness and flavor.