Name: Creamy Spinach Chicken Casserole
Prep time: 5 min
Cook time: 25 min
Total time: 30 min
Ingredients: 1 lb chicken breasts (about 2, cut in half horizontally); 8 oz fresh spinach; 8 oz shredded Monterey Jack cheese; 1/2 cup mayonnaise; 1/2 cup sour cream; 1/2 cup grated parmesan cheese; 1/2 tsp ground black pepper; 1 tsp garlic salt

Creamy Spinach Chicken Casserole

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Creamy Spinach Chicken Casserole

This Creamy Spinach Chicken Casserole is a weeknight dinner hero—simple, satisfying, and packed with flavor.

Made with just a few basic ingredients, this dish layers tender chicken breasts, fresh spinach, and a creamy parmesan sauce, all baked to perfection under a melty cheese crust.

It’s one of those recipes that feels like comfort food without any fuss!

Whether you serve it over rice or pasta, it’s a crowd-pleaser that will quickly become a favorite in your dinner rotation.

Just 30 minutes, and dinner is served!

For the Casserole:

Chicken Breasts – I use 1 lb of chicken breasts (about 2 breasts, halved) for this recipe. You can easily swap them for thighs if you prefer dark meat.
Fresh Spinach – 8 oz of spinach adds a fresh, earthy flavor and helps balance out the creaminess of the sauce.
Monterey Jack Cheese – 8 oz of shredded Monterey Jack cheese for that melt-in-your-mouth cheesy crust on top.

For the Creamy Sauce:

Mayonnaise – 1/2 cup for a rich, creamy base.
Sour Cream – 1/2 cup adds tang and creaminess to the sauce.
Parmesan Cheese – 1/2 cup of grated parmesan cheese brings a savory, cheesy flavor to the sauce.
Black Pepper – 1/2 tsp to season the sauce.
Garlic Salt – 1 tsp of garlic salt enhances the flavor with a little garlic kick.

Creamy Spinach Chicken Casserole

Craving a comforting, creamy dish that’s quick and simple to make? This Creamy Spinach Chicken Casserole is your answer! With tender chicken, fresh spinach, and a rich parmesan cream sauce, it’s a guaranteed crowd-pleaser that will become a staple in your dinner rotation.

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Course: Main Course

Cuisine: American

Keyword: Creamy Spinach Chicken Casserole

Prep Time: 5

Cook Time: 25

Total Time: 30

Servings: servings

Calories: 272kcal

Ingredients

For the Casserole:

1 lb chicken breasts (about 2, cut in half horizontally)
8 oz fresh spinach
8 oz shredded Monterey Jack cheese

For the Creamy Sauce:

1/2 cup mayonnaise
1/2 cup sour cream
1/2 cup grated parmesan cheese
1/2 tsp ground black pepper
1 tsp garlic salt

Instructions

Preheat the Oven:

Set your oven to 500°F. Lightly coat a 13x9-inch baking dish with cooking spray and set aside.

Prepare the Sauce:

In a medium bowl, mix together the mayonnaise, sour cream, parmesan cheese, black pepper, and garlic salt until smooth and well-combined.

Assemble the Casserole:

Layer the fresh spinach in the bottom of the prepared baking dish. Next, place the uncooked chicken breasts on top of the spinach. Spread the creamy sauce evenly over the chicken breasts.

Add Cheese:

Sprinkle the shredded Monterey Jack cheese over the top of the casserole.

Bake:

Place the dish on the bottom rack of the preheated oven and bake for 20-25 minutes, or until the chicken is fully cooked and the spinach has wilted.

Notes

Be sure to use a baking dish that can withstand high oven temperatures (500°F), such as a heavy-duty Dutch oven.
For a creamy and flavorful meal, serve over your favorite rice or pasta.

Nutrition

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Can I make the casserole ahead of time?

Absolutely! You can prepare the casserole the day before, cover it, and refrigerate it. When you’re ready to bake, let it sit for about 30 minutes at room temperature, then pop it into the oven.
Can I freeze leftovers?

Yes! This casserole freezes really well. Let it cool completely, then wrap it tightly in plastic wrap or foil and store in the freezer for up to 3 months. To reheat, thaw overnight in the fridge and bake at 350°F (175°C) until warmed through.
Can I use a different cheese?

Of course! If you don’t have Monterey Jack, feel free to use mozzarella or even cheddar. Just make sure to use a cheese that melts well for that creamy, gooey texture.
Can I use frozen spinach instead of fresh?

Yes, frozen spinach works just as well! Just make sure to thaw it and squeeze out any excess water before adding it to the casserole.
How should I store leftovers?

Store any leftovers in an airtight container in the fridge for up to 3 days. Simply reheat in the microwave or oven until hot, and you’ll have another round of comfort food!