Preheat your oven to 350°F (175°C). Cut the chicken breast into bite-sized cubes and season with garlic powder, onion powder, salt, and pepper.

In a mixing bowl, combine cream of chicken soup, cream cheese, and mayonnaise. Mix until smooth. Fold in cheddar cheese, half of the bacon, and green onions.

Grease a 9x13 inch casserole dish. Pour the chicken mixture into the prepared dish and spread it out evenly.

Combine crushed Ritz crackers with melted butter in a bowl, then sprinkle over the chicken mixture.

Bake for 45 to 55 minutes until the edges are bubbling and the topping is golden brown. Optionally cover with foil if over-browning.

Allow the casserole to cool for 10 to 15 minutes. Sprinkle with remaining bacon and green onions before serving.