Preheat oven to 400°F. In a large bowl mix together soups, sour cream, chicken broth, & pepper, until we'll combine. Stir in 1 cup of cheese, hash browns, and chicken. Place in the bottom of a lightly greased 9x13'' pan. Top with remaining 1/2 cup of cheese.
In a small mixing bowl mix together crackers and butter. Sprinkle over hash brown mixture.