Shred 3 chicken breasts and add to mixture of 2 cans Cream of Mushroom soup, 2 cups sour cream, 7 tablespoons chicken broth from cooked chicken, and salt and pepper to taste. Melt 1/2 stick butter. Put one tube of Ritz crackers into a ziplock bag, roll into fine crumbs, and add to melted butter. Put buttered crumbs on top of chicken mixture and bake at 350 for 35 minutes or until bubbly. Great served with or over rice and your favorite vegetable. (You can freeze this dish for later).