Comfort Classics

Chicken And Spinach Casserole

Name: Chicken And Spinach Casserole
Prep time: 20 min
Cook time: 35 min
Total time: 55 min
Yield: 6 servings
Ingredients: 1 1/2 pounds (675g) boneless, skinless chicken breasts, cut into 1-inch (2.5cm) pieces; 2 cups (200g) fresh spinach leaves; 1 cup (115g) grated cheddar cheese; 1/2 cup (55g) grated Parmesan cheese; 1/2 cup (115g) all-purpose flour; 1 teaspoon (5g) salt; 1/4 teaspoon (1g) black pepper; 2 tablespoons (30g) unsalted butter; 1 cup (235ml) chicken broth; 1/2 cup (120ml) heavy cream; 2 cloves garlic, minced; 1/2 teaspoon (2g) dried thyme

By Priya Norwood · June 19, 2026 · Comfort Classics

Prep20 min

Cook35 min

Total55 min

Serves6

I still remember the first time I made a chicken and spinach casserole for my family. It was a cold winter evening, and we all gathered around the table, eager to taste the warm, aromatic dish that had been baking in the oven for hours. The combination of tender chicken, fresh spinach, and creamy cheese was an instant hit, and it has since become a staple in our household.

As a home cook, I love making casseroles because they are easy to prepare, feed a crowd, and can be made ahead of time. This chicken and spinach casserole is no exception. With its simple ingredients and straightforward instructions, it's a perfect dish for a weeknight dinner or a special occasion.

What makes this recipe special is the way the flavors meld together. The chicken is cooked to perfection, the spinach adds a burst of freshness, and the cheese provides a rich, creamy sauce. It's a match made in heaven, and I just can't get enough of it.

This recipe is perfect for anyone looking for a comforting, satisfying meal that's easy to make and pleases both kids and adults. Whether you're a busy parent, a college student, or simply a foodie, you'll love this chicken and spinach casserole. So go ahead, give it a try, and let me know what you think!

I like to serve this casserole with a side of warm bread or a green salad, but feel free to get creative and add your own favorite sides. And don't worry if you have leftovers - they're just as delicious the next day.

Why You’ll Love This Recipe

This recipe is easy to make and requires minimal ingredients.
It's perfect for a weeknight dinner or a special occasion.
The combination of chicken, spinach, and cheese is a classic and crowd-pleasing.
The casserole can be made ahead of time and refrigerated or frozen for later use.
It's a great way to use up leftover chicken or spinach.
The recipe is versatile and can be customized to suit your tastes.
It's a comforting and satisfying meal that's sure to become a family favorite.

Why This Recipe Works

This recipe works because it combines the right ingredients in the right proportions. The chicken is cooked to a safe internal temperature of 165 F (74 C), ensuring that it's tender and juicy. The spinach adds a burst of freshness, while the cheese provides a rich, creamy sauce.

The key to this recipe is the layering of the ingredients. By placing the chicken at the bottom, the spinach in the middle, and the cheese on top, we create a dish that's both visually appealing and flavorful. The chicken cooks evenly, the spinach wilts into the cheese, and the top layer of cheese browns to perfection.

Another important aspect of this recipe is the resting time. By letting the casserole rest for 10-15 minutes before serving, we allow the juices to redistribute, the cheese to set, and the flavors to meld together. This results in a dish that's not only delicious but also easy to slice and serve.

Finally, this recipe is versatile and can be made ahead of time. Simply assemble the casserole, refrigerate or freeze it, and bake it when you're ready. This makes it perfect for busy weeknights, special occasions, or meal prep.

Ingredients You’ll Need

When it comes to making a delicious chicken and spinach casserole, the ingredients are just as important as the instructions. You'll need a combination of fresh and pantry staples, including chicken, spinach, cheese, and spices. Be sure to choose high-quality ingredients, such as fresh spinach and real cheese, to get the best flavor out of your dish.

One of the great things about this recipe is that it's easy to customize to your tastes. Don't like spinach? Try using kale or collard greens instead. Want to add some extra flavor? Throw in some diced onions or bell peppers. The possibilities are endless, and I encourage you to get creative and make this recipe your own.

1 1/2 pounds (675g) boneless, skinless chicken breasts, cut into 1-inch (2.5cm) piecesI like to use boneless, skinless chicken breasts for this recipe because they're easy to cook and provide a lean protein source. You can also use boneless, skinless chicken thighs if you prefer.
2 cups (200g) fresh spinach leavesFresh spinach is essential for this recipe, as it provides a burst of freshness and flavor. You can also use frozen spinach, but be sure to thaw it first and squeeze out as much water as possible.
1 cup (115g) grated cheddar cheeseI like to use a combination of cheddar and Parmesan cheese for this recipe, as it provides a rich and creamy flavor. You can also use other types of cheese, such as mozzarella or feta, if you prefer.
1/2 cup (55g) grated Parmesan cheeseParmesan cheese adds a salty, nutty flavor to the dish and helps to balance out the richness of the cheese sauce.
1/2 cup (115g) all-purpose flourThe flour is used to thicken the cheese sauce and provide a smooth, creamy texture. You can also use cornstarch or tapioca flour if you prefer.
1 teaspoon (5g) saltSalt is essential for bringing out the flavors in the dish and enhancing the overall flavor profile. Use a high-quality salt, such as kosher or sea salt, for the best results.
1/4 teaspoon (1g) black pepperBlack pepper adds a subtle, slightly spicy flavor to the dish and helps to balance out the richness of the cheese sauce.
2 tablespoons (30g) unsalted butterButter is used to grease the baking dish and add a rich, creamy flavor to the dish. You can also use olive oil or other types of fat if you prefer.
1 cup (235ml) chicken brothChicken broth is used to add moisture to the dish and provide a savory flavor. You can also use vegetable broth or other types of broth if you prefer.
1/2 cup (120ml) heavy creamHeavy cream is used to add a rich, creamy texture to the cheese sauce and provide a luxurious flavor. You can also use half-and-half or whole milk if you prefer.
2 cloves garlic, mincedGarlic adds a pungent, savory flavor to the dish and helps to balance out the richness of the cheese sauce. Use fresh garlic for the best results.
1/2 teaspoon (2g) dried thymeThyme adds a subtle, slightly earthy flavor to the dish and helps to balance out the flavors. Use fresh thyme if you prefer, but be sure to chop it finely before adding it to the dish.

Ingredients for Chicken And Spinach Casserole

Equipment You’ll Need

Large heavy skillet or sauté pan9x13-inch (23x33cm) baking dishInstant-read thermometerSharp chef's knifeCutting boardMeasuring cups and spoonsWhisk

How to Make Chicken And Spinach Casserole

1
Preheat your oven to 375 F (190 C).
2
In a large skillet or sauté pan, melt 1 tablespoon (15g) of butter over medium-high heat. Add the chicken and cook until browned on all sides and cooked through, about 5-7 minutes. Remove the chicken from the skillet and set it aside.
3
In the same skillet, add the remaining 1 tablespoon (15g) of butter. Add the garlic and cook until fragrant, about 1 minute. Add the spinach and cook until wilted, about 2-3 minutes. Season with salt, pepper, and thyme.
4
In a large bowl, whisk together the flour, salt, and pepper. Add the chicken broth and heavy cream, and whisk until smooth. Bring the mixture to a simmer over medium heat, and cook until it thickens, about 2-3 minutes. Remove from heat and stir in the cheddar and Parmesan cheese until melted and smooth.
5
In a 9x13-inch (23x33cm) baking dish, arrange half of the cooked chicken in the bottom of the dish. Top with half of the spinach mixture, followed by half of the cheese sauce. Repeat the layers, starting with the chicken, then the spinach, and finally the cheese sauce.
6
Cover the dish with aluminum foil and bake for 25 minutes. Remove the foil and continue baking for an additional 10-15 minutes, or until the top is golden brown and the casserole is hot and bubbly.
7
Remove the casserole from the oven and let it rest for 10-15 minutes before serving. This will allow the juices to redistribute and the cheese to set.
8
To ensure the chicken is cooked to a safe internal temperature, use an instant-read thermometer to check the temperature in the thickest part of the breast. The temperature should reach 165 F (74 C).
9
Slice the casserole into portions and serve hot, garnished with additional thyme if desired.
10
You can also make this casserole ahead of time and refrigerate or freeze it for later use. Simply assemble the casserole, cover it with plastic wrap or aluminum foil, and refrigerate for up to 24 hours or freeze for up to 3 months. Bake the casserole frozen, covered with foil, for an additional 10-15 minutes, or until hot and bubbly.

Expert Tips

To prevent the casserole from becoming too dry, make sure to cover it with foil during the first 25 minutes of baking.
If you prefer a crisper top, broil the casserole for an additional 2-3 minutes, or until golden brown.
To add some extra flavor, try adding some diced onions or bell peppers to the skillet with the garlic and spinach.
For a creamier cheese sauce, use a higher ratio of heavy cream to chicken broth.
To make the casserole more substantial, try adding some cooked pasta or rice to the layers.
For a gluten-free option, substitute the all-purpose flour with a gluten-free flour blend and use gluten-free chicken broth.
To make the casserole more budget-friendly, use leftover chicken or spinach, and substitute the heavy cream with whole milk or half-and-half.
To make the casserole more crowd-pleasing, try adding some diced ham or bacon to the layers for added smokiness.

Common Mistakes to Avoid

Not cooking the chicken to a safe internal temperature, which can result in foodborne illness.
Overmixing the cheese sauce, which can result in a grainy or separated texture.
Not letting the casserole rest before serving, which can result in a messy or difficult-to-serve dish.
Using low-quality ingredients, such as frozen spinach or processed cheese, which can result in a less flavorful or less textured dish.
Not covering the casserole with foil during the first 25 minutes of baking, which can result in a dry or overcooked top.
Not stirring the cheese sauce constantly, which can result in a lumpy or uneven texture.

Variations and Substitutions

Try using different types of cheese, such as mozzarella or feta, for a unique flavor profile.
Add some diced ham or bacon to the layers for added smokiness.
Use leftover chicken or turkey for a budget-friendly option.
Substitute the spinach with kale or collard greens for a different texture and flavor.
Add some diced onions or bell peppers to the skillet with the garlic and spinach for added flavor.
Use gluten-free flour and chicken broth for a gluten-free option.
Try using different types of pasta or rice for a more substantial casserole.

What to Serve With Chicken And Spinach Casserole

This chicken and spinach casserole is perfect for serving with a side of warm bread or a green salad. You can also try serving it with some roasted vegetables, such as asparagus or Brussels sprouts, for a well-rounded meal. If you're looking for a comforting and satisfying meal, try serving the casserole with some mashed potatoes or egg noodles.

The casserole is also a great option for a crowd, as it can be made in large quantities and served hot, straight from the oven. Simply slice the casserole into portions and serve with your choice of sides. You can also try serving the casserole with some garlic bread or a side salad for a more substantial meal.

Warm breadGreen saladRoasted vegetablesMashed potatoesEgg noodlesGarlic bread

Make-Ahead, Storage, Freezing and Reheating

This chicken and spinach casserole can be made ahead of time and refrigerated or frozen for later use. To refrigerate, simply assemble the casserole, cover it with plastic wrap or aluminum foil, and refrigerate for up to 24 hours. To freeze, cover the casserole with plastic wrap or aluminum foil and freeze for up to 3 months.

To reheat the casserole, simply bake it in the oven at 375 F (190 C) for 20-25 minutes, or until hot and bubbly. You can also try reheating the casserole in the microwave, but be careful not to overheat, as this can result in a dry or rubbery texture.

If you're looking to make the casserole more convenient, try assembling it in individual portions and freezing for later use. Simply thaw the desired number of portions and bake in the oven until hot and bubbly. This is a great option for meal prep or for a quick and easy dinner.

When storing the casserole, be sure to label it with the date and contents, and store it in an airtight container to prevent drying out or contamination. You can also try storing the casserole in a vacuum-sealed bag or container for added freshness and convenience.

Frequently Asked Questions

Can I make this casserole ahead of time?

Yes, you can make this casserole ahead of time and refrigerate or freeze it for later use. Simply assemble the casserole, cover it with plastic wrap or aluminum foil, and refrigerate for up to 24 hours or freeze for up to 3 months.

Can I substitute the spinach with kale or collard greens?

Yes, you can substitute the spinach with kale or collard greens for a different texture and flavor. Simply use the same amount called for in the recipe and adjust the cooking time as needed.

Can I use leftover chicken or turkey for this recipe?

Yes, you can use leftover chicken or turkey for this recipe. Simply shred or chop the cooked meat and add it to the casserole in place of the raw chicken.

Can I make this casserole gluten-free?

Yes, you can make this casserole gluten-free by substituting the all-purpose flour with a gluten-free flour blend and using gluten-free chicken broth.

Can I freeze this casserole?

Yes, you can freeze this casserole for up to 3 months. Simply assemble the casserole, cover it with plastic wrap or aluminum foil, and freeze. To reheat, simply bake in the oven at 375 F (190 C) for 20-25 minutes, or until hot and bubbly.

Can I make this casserole in individual portions?

Yes, you can make this casserole in individual portions. Simply assemble the casserole in small baking dishes or ramekins, cover with plastic wrap or aluminum foil, and refrigerate or freeze for later use.

Can I add other ingredients to this casserole?

Yes, you can add other ingredients to this casserole, such as diced onions or bell peppers, to add flavor and texture. Simply add the ingredients to the skillet with the garlic and spinach and adjust the cooking time as needed.

Can I make this casserole in a slow cooker?

Yes, you can make this casserole in a slow cooker. Simply assemble the casserole, cover it with the slow cooker lid, and cook on low for 3-4 hours or on high for 1-2 hours.

Can I make this casserole ahead of time and refrigerate it overnight?

Yes, you can make this casserole ahead of time and refrigerate it overnight. Simply assemble the casserole, cover it with plastic wrap or aluminum foil, and refrigerate for up to 24 hours. Bake in the oven at 375 F (190 C) for 20-25 minutes, or until hot and bubbly.

The Full Recipe

Recipe Card