Preheat your oven to 375°F (190°C). Grease a 9×13-inch baking dish.
Season the chicken breasts on both sides with salt and pepper, then place them in your prepared baking dish.
In a mixing bowl, combine the crushed Ritz crackers, grated Parmesan cheese, and melted butter. Mix well so that the crackers are evenly coated.
Spread the sour cream generously over the chicken breasts in the baking dish.
In another bowl, whisk together the cream of chicken soup and chicken broth until smooth. Pour this heavenly mixture over the chicken and sour cream layer.
Finally, scatter the Ritz cracker mixture evenly over the top of the casserole, creating a delicious crust.
Bake the casserole in the preheated oven for 35-40 minutes, or until the chicken is thoroughly cooked and the topping is golden brown and crispy.
Once out of the oven, allow the casserole to rest for a few minutes before serving. For a pop of color, garnish with chopped fresh parsley if you like.
Serve hot, and enjoy this comforting Ritz Cracker Chicken Casserole alongside your favorite sides!