Pumpkin Cake

1 2/3 cups sugar
4 eggs
1 cup oil
16 ounces pumpkin
2 cups flour
2 teaspoons cinnamon
2 teaspoons baking powder
1 teaspoon salt

FROSTING:
8 ounces cream cheese, softened
1/2 cup butter, melted
2 cups powdered sugar
1 teaspoon vanilla

Mix together first 4 ingredients. Add flour, cinnamon, baking powder and salt. Bake in 9x13 inch pan at 350�F for 35-40 minutes. Combine frosting ingredients, spread over cooled cake.