Creating your delicious Doritos Casserole with Chicken is straightforward if you follow these simple steps:

1. Preheat Oven: Begin by preheating your oven to 350°F (175°C).
2. Prepare Chicken: In a large mixing bowl, combine the cooked and shredded chicken, cream of chicken soup, sour cream, garlic powder, onion powder, salt, and pepper. Mix well until combined.
3. Add Veggies: Fold in the frozen corn and diced bell peppers if using. These add both flavor and nutrition.
4. Layer Doritos: In a large casserole dish, spread half of the crushed Doritos to form a base layer.
5. Top with Mixture: Pour the chicken mixture over the Doritos, spreading it evenly.
6. Add Cheese: Sprinkle one cup of shredded cheddar cheese over the chicken mixture.
7. Top with Doritos: Add the remaining crushed Doritos on top of the cheese layer for that signature crunch.
8. Bake: Place in the preheated oven and bake for 40-45 minutes, or until the casserole is hot and bubbly.
9. Cool: Once baked, remove from the oven and let the casserole cool for about 5-10 minutes before serving.
10. Garnish: If desired, sprinkle fresh cilantro or sliced green onions on top before scooping out portions.

By following these steps, you’ll create a mouthwatering Doritos Casserole with Chicken that is sure to impress!