– Preheat oven to 350 and spray a baking dish with nonstick cooking spray – Stir together the cream of chicken and sour cream. – Spread the mixture in the bottom of the casserole dish. – Top with chicken and the cheese. – Stir together the crackers, butter, and poppy seeds. Sprinkle over the top of the chicken mixture. – Bake for 30 minutes, until the crackers are golden brown and the sauce is bubbling.