Creamy Chicken and Spinach Casserole Recipe
Introduction
This Irresistible Creamy Chicken and Spinach Casserole is a comforting, cheesy dish that’s perfect for a quick weeknight meal. With tender chicken, fresh spinach, and a rich creamy sauce topped with melted Monterey Jack and parmesan cheese, it’s sure to satisfy the whole family.

Ingredients
- 3/4 cup mayonnaise (preferably Hellmann’s)
- 3/4 cup sour cream
- 1/2 cup parmesan cheese, freshly grated
- 1/2 tsp pepper
- 1 tsp garlic salt
- 1/4 tsp onion powder
- 1.25 lb chicken, cut into 1-inch bite-sized cubes
- 8 oz spinach
- 8 oz Monterey Jack cheese, freshly grated (Tillamook recommended)
Instructions
- Step 1: Preheat your oven to 500°F and lightly grease a 9×13 inch baking dish. Prepare the chicken by cutting it into 1-inch bite-sized cubes. Grate the Monterey Jack and parmesan cheeses, and gather all other ingredients for easy assembly.
- Step 2: In a medium bowl, whisk together mayonnaise, sour cream, garlic salt, onion powder, and pepper until smooth and well combined. Taste and adjust seasoning if needed.
- Step 3: Spread the spinach evenly across the bottom of the baking dish, breaking up any clumps. Layer the chicken cubes evenly over the spinach.
- Step 4: Pour the creamy sauce over the chicken, spreading it gently with a spatula to coat everything. Sprinkle the grated Monterey Jack and parmesan cheese evenly over the top.
- Step 5: Place the casserole on the bottom rack of the preheated oven and bake for 20–25 minutes until the cheese is melted, golden brown, and the sauce is bubbling around the edges.
- Step 6: Remove from the oven and let rest for 2–3 minutes before serving to allow the sauce to set and make portioning easier.
Tips & Variations
- Use freshly grated cheese instead of pre-shredded for a smoother melt and better texture.
- For extra flavor, add a pinch of smoked paprika or red pepper flakes to the creamy sauce.
- Substitute fresh spinach with frozen, but be sure to thaw and squeeze out excess moisture before layering.
- Serve with a side of crusty bread or a light salad to balance the richness of the casserole.
Storage
Store leftovers covered in the refrigerator for up to 3 days. Reheat gently in the oven at 350°F until warmed through to maintain the creamy texture and crisp cheese topping.
How to Serve

Serve this delicious recipe with your favorite sides.
FAQs
Can I use other types of cheese in this casserole?
Yes, you can substitute Monterey Jack with mozzarella, cheddar, or a cheese blend you prefer. Just choose cheeses that melt well for the best result.
Is it okay to prepare this casserole ahead of time?
Absolutely. You can assemble the casserole, cover it tightly with foil, and refrigerate it for up to 24 hours before baking. Just add a few extra minutes to the baking time if baking straight from the refrigerator.
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Creamy Chicken and Spinach Casserole Recipe
- Total Time: 35 minutes
- Yield: 4 servings 1x
Description
This Irresistible Creamy Chicken and Spinach Casserole is a rich, comforting dish featuring tender bite-sized chicken cubes layered with fresh spinach and a luscious creamy sauce, all topped with melted Monterey Jack and Parmesan cheese. Perfectly baked to golden perfection, it’s an easy yet elegant meal ideal for busy weeknights or cozy dinners.
Ingredients
For the Creamy Sauce:
- 3/4 cup mayonnaise (preferably Hellmann’s)
- 3/4 cup sour cream
- 1/2 cup freshly grated Parmesan cheese
- 1/2 tsp pepper
- 1 tsp garlic salt
- 1/4 tsp onion powder
For the Casserole Base:
- 1.25 lb chicken, cut into 1-inch bite-sized cubes
- 8 oz fresh spinach
- 8 oz Monterey Jack cheese, freshly grated (Tillamook recommended)
Instructions
- Preheat and Prepare: Preheat your oven to 500°F and lightly grease a 9×13 inch baking dish. Cut the chicken into 1-inch bite-sized cubes, finely grate the Monterey Jack and Parmesan cheeses, and measure all other ingredients for quick assembly.
- Make the Creamy Sauce: In a medium bowl, whisk together mayonnaise, sour cream, garlic salt, onion powder, and pepper until smooth and creamy. Taste and adjust seasoning if needed to balance the flavors before baking.
- Assemble the Casserole: Spread the fresh spinach evenly in the bottom of the baking dish, breaking up any clumps. Evenly distribute the chicken cubes over the spinach. Pour the creamy sauce over the chicken, gently spreading it to coat all pieces. Finally, sprinkle the grated Monterey Jack and Parmesan cheese evenly on top.
- Bake the Casserole: Place the casserole on the bottom rack of the preheated oven. Bake for 20–25 minutes until the cheese is melted, golden brown, and the sauce bubbles around the edges. The chicken will cook through quickly at this high temperature, and the bottom rack ensures the spinach softens while the cheese browns perfectly.
- Rest and Serve: Remove the casserole from the oven and let it rest for 2–3 minutes. This brief rest allows the sauce to set slightly, making it easier to portion and serve.
Notes
- Use freshly grated cheese for better melting and texture.
- Adjust seasoning in the creamy sauce to your preference before baking.
- Cooking at a high temperature (500°F) helps achieve a golden cheese crust quickly while cooking chicken thoroughly.
- Resting the casserole after baking helps the sauce set for cleaner slices.
- Prep Time: 10 minutes
- Cook Time: 25 minutes
- Category: Casserole
- Method: Baking
- Cuisine: American
Keywords: Creamy Chicken Casserole, Spinach Casserole, Baked Chicken Dish, Comfort Food, Easy Dinner Recipe

