Creating Chicken and Spinach Casserole with Cream Cheese is straightforward if you follow these easy steps:

1. Preheat Oven – Preheat your oven to 350°F (175°C).

2. Cook Chicken: If not using pre-cooked chicken, boil or sauté chicken breast until fully cooked. Shred or cube the chicken once cooked.

3. Prepare Dish: Lightly grease a medium-sized casserole dish with olive oil.

4. Combine Ingredients: In a large mixing bowl, combine the shredded chicken, chopped spinach, softened cream cheese, sour cream, garlic powder, onion powder, salt, and black pepper. Mix until well blended.

5. Add Cheeses: Fold in half of the shredded cheddar cheese and half of the grated Parmesan cheese to the mixture.

6. Transfer to Dish: Spoon the mixture into the prepared casserole dish, spreading it out evenly.

7. Top with Cheese: Sprinkle the remaining cheddar and Parmesan cheese over the top of the casserole.

8. Breadcrumb Topping (Optional): If desired, sprinkle breadcrumbs over the top for added crunch.

9. Bake: Place the casserole in the preheated oven and bake for 30-40 minutes, or until the top is bubbly and golden brown.

10. Cool Slightly: Once out of the oven, allow the casserole to cool for about 10 minutes before serving.