Moist and Delicious Pumpkin Bars

Why I Love This Recipe
One of my husband co-workers asked if his wife could make pumpkin bars, so of course I just had to comply. They were a hit and they said to tell me that I can bake for them anytime.
Ingredients You'll Need
1 cup granulated sugar
1 cup brown sugar
2 cups all purpose flour
15 oz. can of pumpkin
1 cup oil
4 eggs
2 teaspoons baking powder
1 teaspoon baking soda
1 1/2 teaspoons cinnamon
1/2 teaspoon salt
2 dashes allspice
**Maple cinnamon cream cheese icing
Directions
Bring eggs to room temperature.
Preheat oven to 350 degrees
spray a 15 1/2 x 10 1/2 jelly roll pan
Onto wax paper, measure out 2 cups flour, 2 teaspoons baking powder, 1 teaspoon baking soda, 1 1/2 teaspoons cinnamon, 1/2 teaspoon salt and 2 dashes allspice. I usually sift these all together to make sure I don't get a lump of baking soda etc. in my bars, but it is optional.
In large mixing bowl, mix together the two sugars, 15 oz of pumpkin, 1 cup oil, and the 4 room temperature eggs.
Add the dry ingredients a little at a time to the wet until they are blended together.
Pour onto the greased jelly roll pan, or a cookie sheet with sides.
Bake in a preheated 350 degree for 25 to 35 minutes.
Cool and frost with cream cheese icing and then cut into bars before removing from the pan.
**To regular cream cheese icing I added 3 teaspoons pure maple syrup and 1 teaspoon cinnamon.