Line a 15x10x1 inch pan with aluminum foil; set aside.
In a medium bowl stir together the flour, baking powder, cinnamon, baking soda and salt; set aside.
In a large mixing bowl beat eggs, pumpkin, sugar and oil.
Add the flour mixture; beat until well combined.
Spread batter in a prepared pan. Bake in a 350 degree oven for 25 to 30 minutes or until toothpick inserted comes out clean.
Cool on wire rack.
Once cooled frost with cream cheese frosting.
Cut into squares.