Preheat oven to 350°F (175°C). Grease a 9x13-inch baking dish.
In a bowl, mix shredded chicken, cream of chicken soup, and sour cream until combined.
Spread mixture evenly in the prepared dish.
Sprinkle crushed Ritz crackers over the top.
Add shredded cheddar cheese as the final layer.
Bake for 25–30 minutes until hot, bubbly, and golden brown.
Let cool for 5 minutes before serving.
Notes
For added crunch, drizzle 2 tbsp melted butter over the cracker topping.You can use canned or rotisserie chicken for convenience.Add frozen peas or diced veggies for variety.