Pumpkin Bars

I got this recipe from my friend Misti a few years ago.  They are rich and delicious!

Pumpkin Bars

1 cup vegetable oil
2 cup sugar
2 cup pumpkin
4 eggs
2 cup flour
2 tsp baking powder
1 tsp baking soda
1/2 tsp salt
2 tsp cinnamon
8 oz cream cheese - softened
1 stick butter
1 tsp vanilla
1 LB powdered sugar

Beat oil, sugar, pumpkin, and eggs. Add flour, baking powder, baking soda, salt, and cinnamon. Mix well. Pour into greased 15x10x1" jelly roll pan. Bake at 350° for 40-45 minutes. Beat cream cheese, butter, and vanilla. Add powdered sugar and mix well keep adding powdered sugar until it reaches the desired consistency. Spread over cooled bars. Refrigerate.