Preheat the oven to 350. Prepare a 9" square cake pan with cooking spray and flour; set aside. In a mixing bowl, combine butter, sugar, egg, pumpkin, and cider. Mix well. Fold in flour, cinnamon, baking powder, baking soda, salt, cloves, and nutmeg. Mix until moistened. Spread batter into prepared pan. Bake for 25 minutes. Cool in the pan.