Preheat oven to 350°
In a medium bowl, whisk flour, baking powder, baking soda, cinnamon, nutmeg, cloves, ginger and salt. Set aside.
In a large bowl, mix eggs, pumpkin, sugar, brown sugar and vegetable oil together and beat on low until light and fluffy.
Add dry ingredients and mix until combined.
Pour into an ungreased 10 x 15 jelly roll pan and bake for 27-30 minutes until toothpick inserted comes out clean.
Carefully remove from oven and place on wire rack to cool.
Beat cream cheese, butter and vanilla together in a large bowl with an electric mixer.
Gradually add powdered sugar and mix until combined.
Frost pumpkin bars after they have cooled completely and cut into desired size.
Recipe adapted from Allrecipes