Preheat the oven to 350-F.
Lightly butter a 9x13 baking dish (or use cooking spray); set aside.
In a large bowl, combine the cream cheese, cottage cheese, sour cream, cream soup, and seasonings.
1 8 ounce pkg cream cheese, 1 cup cottage cheese, ½ cup sour cream, 1 10.75 ounce can of cream soup, or 2 cups homemade Cream Soup Substitute, ½ teaspoon garlic powder, ½ teaspoon onion powder
Mix in the cooked chicken.
5 cups leftover chicken
Spoon the chicken mixture into the prepared baking dish.
Combine crushed crackers and melted butter.
1 sleeve buttery crackers, 4 tablespoons butter
Sprinkle the buttery ritz cracker topping on top of the casserole evenly.
Bake for 35-40 minutes until hot and bubbly.