In the bowl of a mixer, combine the eggs, sugar, oil and pumpkin until light and fluffy. Whisk together the flour, baking powder, cinnamon, salt and baking soda.
Gradually add the dry ingredients to the pumpkin mixture and mix until thoroughly combined and smooth.
Pour batter into a greased 13x10 baking dish, and bake in a pre-heated 350 degree oven for 20-30 minutes or until skewer inserted in the middle comes out clean. Let cool completely before cutting into squares.
In the bowl of a mixer, combine the cream cheese and butter and beat with a whisk attachment until smooth.
Add confectioners' sugar and mix until combined. Add vanilla extract and beat until thoroughly combined.
