Creating the delicious Chicken Cordon Bleu Casserole is a simple and enjoyable experience. Follow these easy steps to delight your family:

1. Preheat the Oven: Begin by preheating your oven to 350°F (175°C).
2. Prepare Your Baking Dish: Grease a 9×13 inch casserole dish with cooking spray or butter.
3. Mix the Liquids: In a large bowl, combine the sour cream, mayonnaise, Dijon mustard, garlic powder, onion powder, paprika, salt, and pepper. Mix well until smooth.
4. Add the Chicken and Ham: Stir in the cooked chicken and diced ham until they are thoroughly coated with the mixture.
5. Layer the Ingredients: Spread half of the chicken and ham mixture evenly in the bottom of the prepared casserole dish. Then sprinkle half of the shredded Swiss cheese on top.
6. Repeat Layering: Add the remaining chicken and ham mixture on top, followed by the rest of the Swiss cheese to create a second layer.
7. Add Cornflakes Topping: In a separate bowl, combine the crushed cornflakes with melted butter. Stir until the cornflakes are evenly coated. Top the casserole with the cornflake mixture.
8. Bake: Place the casserole in the preheated oven and bake for about 30-35 minutes, or until the top is golden brown and the casserole is bubbly.
9. Cool Slightly: Once baked, let the casserole cool for about 10-15 minutes. This allows it to set slightly for easier serving.
10. Garnish: Sprinkle with fresh parsley, if desired, to add a burst of color.

Follow these straightforward steps, and you’ll be rewarded with a hearty and satisfying Chicken Cordon Bleu Casserole that your family will love!