In a mixer on medium speed, combine the eggs, sugar, oil, and pumpkin.
In a separate bowl mix together the dry ingredients: flour, cinnamon, baking powder, baking soda, and salt.
Add the dry ingredients into the pumpkin mixture. Mix on low speed until combined.
Pour the batter into a greased 9x13 inch pan, smooth out the surface.
Bake at 350°F for 30-35 minutes. Let cool completely before frosting bars.
To Make Frosting: In a mixer over medium speed combine the cream cheese and butter until smooth. Mix in vanilla extract. On low speed add in the powdered sugar until completely combined. Spread onto cooled bars.