Preheat oven to 350* Beat the oil, sugar, eggs and pumpkin on medium speed for 2 minutes. .
Combine the flour, cinnamon, salt, baking powder and baking soda in a small bowl with a whisk. Pour dry ingredients into wet ingredients and mix on low until smooth.
Beat butter on high for 2 minutes. Add cream cheese and mix until smooth. Add the powdered sugar and vanilla and mix until smooth. Spread across cooled bars.