Preheat oven to 350 degrees. Prepare 9x9 baking dish, spray with non-stick cooking spray, set aside.
In a large mixing bowl, mix together sour cream, cream of chicken soup, shredded parmesan cheese, and poppyseeds. Mix until incorporated. Add the chicken and mix again.
Spread along the bottom of the prepared baking dish.
Crush the ritz crackers. Add melted butter and crushed crackers to a small bowl, and toss to combine.
Sprinkle on top of the chicken mixture. Bake uncovered for 25-30 minutes until hot and bubbly and golden brown.
Garnish with thinly sliced green onions or minced parsley.
Notes
Variations -
Switch out the parmesan cheese for cheddar cheese or pepper jack cheese for flavor.
Add in some diced onion, bell peppers, or broccoli or a bag of frozen vegetables.
Stretch this casserole by putting it over white rice or egg noodles.
Replace the cooked chicken with seared pork chops to change up the protein in this creamy casserole.
Instead of cream of chicken soup you can use cream of mushroom soup for this tasty casserole.