Creamy Spinach Chicken Casserole

If you’re searching for a comforting, creamy, and cheesy dinner that’s both wholesome and easy to make, this Creamy Spinach Chicken Casserole is the answer. Packed with juicy chicken breasts, fresh spinach, and a velvety parmesan sauce, this one-pan wonder delivers restaurant-style flavor without the fuss. Even better, it comes together in just 30 minutes, making it perfect for busy weeknights or cozy family dinners.

Whether you’re a fan of cheesy casseroles, need a new way to sneak veggies onto the plate, or just love quick comfort food recipes, this dish will become a household favorite.

Why You’ll Love This Creamy Spinach Chicken Casserole

Quick and Easy – Just 10 minutes of prep and the oven does the rest.
Family-Friendly – Even picky eaters won’t mind eating spinach when it’s smothered in cheese and cream sauce.
One-Pan Meal – No need for multiple pots and pans; everything bakes in one dish.
Wholesome & Delicious – High in protein, low in carbs, and loaded with flavor.

Creamy Spinach Chicken Casserole

This Creamy Spinach Chicken Casserole is a quick, cheesy, and comforting dinner made with tender chicken, fresh spinach, and a rich parmesan cream sauce.

Course: Main Course Cuisine: American
Keyword: Creamy Spinach Chicken Casserole
Prep Time: 5minutes minutes Cook Time: 25minutes minutes
Total Time: 30minutes minutes Servings: 8 servings

Ingredients You’ll Need

Here’s everything you need to bring this casserole to life:

For the Casserole

Chicken Breasts – Boneless, skinless, and halved crosswise for even cooking. Chicken thighs also work if you prefer richer flavor.
Fresh Spinach – Provides freshness and extra nutrients.
Monterey Jack Cheese – Melts beautifully for that gooey, cheesy topping.

For the Creamy Sauce

Mayonnaise – The creamy base that holds the sauce together.
Sour Cream – Adds tanginess and richness.
Parmesan Cheese – Infuses the sauce with salty, cheesy depth.
Garlic Salt – Brings bold flavor.
Black Pepper – A pinch for balance and seasoning.

Step-by-Step Instructions

1. Preheat the Oven

Set your oven to 400°F (200°C). Lightly grease a 9×13-inch baking dish with olive oil or cooking spray.

2. Make the Creamy Sauce

In a mixing bowl, combine mayonnaise, sour cream, parmesan, garlic salt, and pepper. Stir until smooth and creamy.

3. Assemble the Layers

Spread spinach evenly in the bottom of the baking dish.
Place raw chicken breasts on top of the spinach.
Spoon the creamy sauce mixture over the chicken.

4. Add the Cheese

Sprinkle shredded Monterey Jack cheese over everything for a golden, gooey finish.

5. Bake

Bake uncovered for 25–30 minutes, or until the chicken is fully cooked (internal temp should reach 165°F). If you like an extra golden top, broil for 2–3 minutes at the end.

Tips for the Best Spinach Chicken Casserole

Use fresh spinach if possible, but if using frozen, thaw and squeeze out all water first.
Check doneness with a meat thermometer to avoid overcooking.
Add a crunchy topping by sprinkling breadcrumbs mixed with parmesan before baking.
Make it low-carb by serving with cauliflower rice instead of pasta or regular rice.

What to Serve With Spinach Chicken Casserole

This casserole is hearty on its own, but pairing it with simple sides makes it even better. Try it with:

Garlic bread or dinner rolls
Steamed broccoli or roasted asparagus
Rice, quinoa, or cauliflower rice
A light garden salad

Variations and Substitutions

Cheese Swap – Use mozzarella, cheddar, or a Mexican blend if you don’t have Monterey Jack.
Protein Twist – Swap chicken with turkey or even shrimp for a different flavor.
Add Veggies – Mushrooms, zucchini, or bell peppers pair well with the creamy sauce.
Pre-Cooked Chicken – Rotisserie chicken works great if you want to cut baking time.

Make Ahead & Storage

Freeze – Store in freezer-safe portions for up to 3 months. Thaw overnight in the fridge before reheating.

Make Ahead – Assemble the casserole (without baking), cover, and refrigerate up to 24 hours. Bake when ready, adding 5–10 minutes to the cook time.

Store Leftovers – Keep in an airtight container in the fridge for up to 4 days.

Nutrition

Save

Can I use frozen spinach instead of fresh?

Yes! You can use frozen spinach, but make sure to thaw and squeeze out excess water before adding it to the casserole. This prevents the dish from turning watery.

Q2: Can I prepare Creamy Spinach Chicken Casserole ahead of time?

Definitely! You can assemble the casserole, cover, and refrigerate it up to 1 day in advance. When ready, bring it to room temperature for 20–30 minutes before baking.

Q3: Can I use cooked chicken in this recipe?

Yes, rotisserie chicken or leftover cooked chicken works perfectly. Just cut it into bite-sized pieces and slightly reduce the baking time.

Q4: What if I don’t have Monterey Jack cheese?

No problem! You can replace it with mozzarella, cheddar, or a blend of cheeses that melt well.

Q5: How do I keep my casserole from being watery?

The key is to drain spinach thoroughly. For extra protection, you can also add a thin layer of cooked rice or cauliflower rice at the bottom to soak up any excess moisture.

Final Thoughts

This Creamy Spinach Chicken Casserole is proof that comfort food doesn’t have to be complicated. With simple ingredients, minimal prep, and incredible flavor, it’s a recipe you’ll come back to again and again. Whether you’re feeding your family on a weeknight or preparing a cozy weekend dinner, this cheesy chicken bake will hit the spot every time.

So grab your baking dish, preheat that oven, and get ready to enjoy a creamy, cheesy casserole that’s as easy as it is delicious!

Creamy Spinach Chicken Casserole