Poppy Seed Chicken

1 whole chicken cooked and cut into small pieces
1 can cream of chicken soup
1 1/2 c. sour cream
1 square butter
8 oz. crushed Ritz crackers crushed
1 Tbsp. poppy seed

•Melt butter and mix in crushed crackers.  Put 3/4 of crackers in the bottom of a 2 qt baking dish.  Mix together chicken, soup and sour cream.  Spread over cracker mixture in baking dish.  Put remaining cracker mixture on top.  Bake at 350º for 20 to 30 minutes.