Prepare the Chicken

Use leftover, rotisserie, or boiled chicken breasts.

Shred into bite-sized pieces with two forks.

Season with salt, pepper, and garlic powder.

Make the Creamy Base

In a large mixing bowl, combine cream of chicken soup, sour cream, cheddar cheese, and garlic powder.

Mix until smooth.

Gently fold in shredded chicken until evenly coated.

Assemble the Casserole

Spread chicken mixture evenly in a greased 9×13-inch baking dish.

Crush Ritz crackers in a separate bowl.

Mix with melted butter until evenly coated.

Sprinkle cracker mixture evenly over the chicken layer.

Bake

Preheat oven to 350°F (175°C).

Cover with foil and bake for 20 minutes.

Remove foil and bake for an additional 10–15 minutes, until topping is golden and casserole is bubbly.