Preheat your oven to 350°F. Grease and flour a 9x13 inch baking dish (or you can line it with parchment paper), and set aside.
In a medium bowl, add flour, baking soda, baking powder, salt, and pumpkin pie spice. Whisk to combine, and set aside.
In a large bowl, combine sugar, eggs, vegetable oil, pumpkin puree and vanilla extract. Whisk to incorporate. Add the dry ingredients to the wet ingredients, and mix together until just combined.
Pour your cake batter into your prepared baking dish. Bake in the center of your preheated 350°F oven for 30 to 35 minutes, or until golden brown on top and a skewer inserted into the center comes out clean. Cool your cake completely before frosting!