Harvest Pumpkin Bars

2 cups flour
2 cups sugar
2 tsp. baking powder
2 tsp. cinnamon
1 tsp. baking soda
1/2 tsp. salt
1 tsp. pumpkin pie spice
2 cups pumpkin (16 oz)
3/4 cup oil
4 eggs

Mix dry ingredients together; add pumpkin, oil and eggs. Mix until smooth. Pour into greased 15x10x1 inch pan. Bake at 350 degrees for 20-25 minutes.

Frosting:
6 oz cream cheese
12 Tbsp. butter (melted)
2 tsp. vanilla
4 cups pd. sugar

Spread frosting on cool bars.
Optional-top with walnuts.