Preheat your oven to 350°F (175°C).
In a large bowl, mix cream of chicken soup, sour cream, onion powder, garlic powder, salt, and pepper.
Add in the shredded chicken and 1½ cups of cheddar cheese. Mix well.
Spread the mixture evenly into a greased 9x13 inch baking dish.
In a separate bowl, combine crushed Ritz crackers with melted butter.
Sprinkle the buttery cracker topping over the chicken mixture.
Top with the remaining ½ cup of cheddar cheese.
Bake for 25–30 minutes until hot and bubbly with a golden topping.