Preheat oven to 350°F. Spray a 9x9-inch baking dish with cooking spray and set aside.
In a large mixing bowl, combine the chicken, sour cream, soup, and poppy seeds until well mixed. Transfer the chicken mixture to the prepared baking pan.
In a medium bowl, combine the crushed crackers with the melted butter, mixing well. Sprinkle the crackers over the top of the chicken mixture.
Bake 25-30 minutes or until the casserole is heated through and bubbly.
If desired, serve over cooked rice or pasta. Garnish with parsley.
Notes
I love using leftover chicken or a store-bought rotisserie chicken for this recipe. In case you need to cook the chicken yourself, feel free to use whatever you have on hand. I usually poach chicken breasts and allow them to cool so it’s easy to shred them.