Nothing beats a warm, comforting meal like this chicken spinach casserole when you want something creamy and satisfying. The blend of tender chicken, fresh spinach, and a luscious sauce creates a dreamy creamy chicken spinach casserole that’s perfect for cozy nights or sharing with family.
You’ll love how easily this recipe comes together and how versatile it is—perfect for weeknight dinners or meal prepping for the week ahead. Let’s dive into making your next favorite casserole!
Why You'll Love This Recipe
- Rich, creamy sauce that’s full of flavor and comfort.
- Healthy boost with fresh spinach packed inside.
- Simple ingredients you likely have on hand.
- Easy to prepare and perfect for feeding a crowd.
- Reheats beautifully, making great leftovers.
Ingredients
Gather these simple, fresh ingredients to create the perfect creamy chicken spinach casserole.
- 3 cups cooked chicken breast, shredded or diced
- 4 cups fresh spinach, roughly chopped
- 1 medium onion, finely chopped
- 3 cloves garlic, minced
- 2 tablespoons unsalted butter
- 3 tablespoons all-purpose flour
- 2 cups whole milk
- 1 cup shredded mozzarella cheese
- 1/2 cup grated Parmesan cheese
- 1/2 teaspoon dried thyme
- 1/4 teaspoon nutmeg
- Salt and pepper to taste
- 1 cup cooked white rice or pasta (optional for extra bulk)
- Nonstick cooking spray or butter, for greasing
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Recipe Details
- Prep Time: 20 minutes
- Cook Time: 30 minutes
- Total Time: 50 minutes
- Servings: 6
- Calories (approx.): 380 per serving
How to Make Dreamy Creamy Chicken & Spinach Casserole: A Comforting Delight!
- Preheat your oven to 375°F and lightly grease a 9x13-inch casserole dish with butter or nonstick spray.
- In a large skillet, melt the butter over medium heat, then sauté the onion and garlic until fragrant and translucent, about 4 minutes.
- Sprinkle the flour over the onion and garlic mixture, stirring constantly for 1-2 minutes to cook out the raw flour taste.
- Slowly whisk in the milk, continuing to stir until the sauce thickens and becomes creamy, about 5-7 minutes. Add thyme, nutmeg, salt, and pepper.
- Remove the skillet from heat and stir in the shredded chicken, chopped spinach, and half the mozzarella and Parmesan cheese until well combined.
- If using, fold in the cooked rice or pasta to the mixture for added texture and heartiness.
- Pour the mixture into the prepared casserole dish and spread evenly. Sprinkle the remaining mozzarella and Parmesan cheese evenly over the top.
- Bake uncovered in the preheated oven for 25-30 minutes, or until the casserole is bubbling and the cheese is golden brown.
- Let the casserole rest for 5 minutes before serving to allow it to set and develop flavors.
Tips for the Best Results
- Use fresh spinach for vibrant color and flavor, but frozen spinach works if well drained.
- Cook the chicken ahead or use leftovers to save time.
- For extra creaminess, substitute half the milk with heavy cream.
- Top with breadcrumbs mixed with a little melted butter for a crunchy crust variation.
- Don’t skip resting the casserole after baking—it helps it hold together better when served.
Storage and Reheating
Store leftover chicken spinach casserole in an airtight container in the refrigerator for up to 4 days. To freeze, portion into freezer-safe containers and keep for up to 3 months.
Reheat refrigerated portions in the oven at 350°F for 15-20 minutes or until warmed through. For frozen portions, thaw overnight in the fridge before reheating for best texture and flavor.
Frequently Asked Questions
Can I use frozen spinach instead of fresh?
Yes, frozen spinach can be used, but make sure to thaw and squeeze out as much moisture as possible to prevent a watery casserole. Fresh spinach will give a brighter flavor and texture.
What type of chicken works best for this casserole?
Cooked chicken breast or thighs both work well. Shredded or diced pieces are ideal for even distribution throughout the casserole.
Can I make this casserole gluten-free?
Yes, substitute the all-purpose flour with a gluten-free flour blend or cornstarch. Also, check that other ingredients like broth or cheese are gluten-free to keep it safe.
Is it possible to prepare this casserole ahead of time?
Absolutely! You can assemble the casserole a day before and keep it covered in the fridge. When ready, bake it as directed, adding a few extra minutes if baking straight from the fridge.