Pumpkin Bars

2 cups flour
2 tsp baking powder
1 tsp baking soda
2 tsp cinnamon
1 tsp pumpkin pie spice
1 1/2 tsp ginger
1 1/4 tsp cloves
1 1/4 tsp nutmeg
2 cups sugar
1 cup chopped walnuts (optional)
1 cup oil (vegetable)
4 eggs
1 small can pumpkin

Mix sugar, eggs and oil together. Add pumpkin. Add rest of ingredients except flour. Mix well. Add flour and mix. Put into a greased 17 x 11 x 3/4 inch baking sheet (cookie sheet). Bake at 350 degrees for 20 to 25 minutes.

Frost with:
8 ounce cream cheese
1 lb powdered sugar
1 stick softened margarine
1/2 tsp vanilla