In a large bowl, combine the thawed hash browns, shredded chicken, French onion dip, can of cream of chicken soup, shredded cheese, garlic powder, onion powder, salt & pepper. Stir until it's combined well.
1 bag (32 oz) frozen southern hash browns, 3 cups cooked shredded chicken, 1 tub (16 oz) French onion dip, 1 can (10.5 oz) cream of chicken soup, 1 cup shredded monterey jack cheese, 1 teaspoon garlic powder, 1 teaspoon onion powder, ½ teaspoon kosher salt, ¼ teaspoon black pepper