Iced Pumpkin Cookies

2 1/2 C. Flour 1 t. Baking Powder 1 t. Baking Soda 2 t. Cinnamon 1/2 t. Nutmeg 1/2 t. Ground Clove 1/2 t. Salt 1/2 C. Butter, softened 1 1/2 C. Sugar 1 C. Pumpkin Puree 1 Egg 1 t. Vanilla Extract 2 C. Powdered Sugar 3 T. Milk