Preheat oven to 350 degrees.
In a bowl, mix together oil, brown sugar, and sugar.
3/4 cup Sugar, 1/4 cup Brown Sugar, 1/3 cup Flavorless Oil
Crack in eggs and mix everything together. Then add in pumpkin and vanilla extract.
1 cup Pumpkin, 1 teaspoon Vanilla, 2 Eggs
To the wet ingredients, add in flour, baking soda, baking powder, pumpkin pie spice, and cinnamon.
1 cup Flour, 1/2 teaspoon Baking Soda, 1 teaspoon Baking Powder, 1 teaspoon Pumpkin Pie Spice, 1/2 teaspoon Cinnamon
Whisk everything together until smooth, then pour into a lined 8x8 square pan.
Bake for about 30 minutes, until a toothpick inserted comes out clean.
Let cool, while you make the frosting.