Preheat the oven to 350°F.
Grease and flour a 9-by-13-inch baking pan, then set aside.
Whisk the flour, baking powder, baking soda, pumpkin pie spice, cinnamon, and salt together in a large bowl.
2 cups all-purpose flour, 2 teaspoons baking powder, 1 teaspoon baking soda, 1 ½ teaspoons pumpkin pie spice, 1 teaspoon cinnamon, ½ teaspoon salt
In a separate bowl, mix the sugar, brown sugar, olive oil, pumpkin puree, eggs, and vanilla.
1 cup sugar, ½ cup brown sugar, ¾ cup extra virgin olive oil, 3 large eggs, 15 oz can pumpkin puree, 2 teaspoons vanilla extract
Slowly add the flour mixture to the wet ingredients and mix until just combined.
Pour the batter into the prepared baking pan.
Bake for 35 to 45 minutes, or until a toothpick inserted into the center comes out clean.
Allow the cake to cool completely before frosting, about 1 hour.