Preheat the oven to 375°F.
In a large mixing bowl, whisk together all the wet ingredients – white sugar, light brown sugar, eggs, vegetable oil, whole milk, pumpkin puree, and vanilla extract until smooth.
Add all the dry ingredients – all-purpose flour, pumpkin spice, cinnamon, baking soda, baking powder, and salt. Whisk vigorously until you have a smooth batter without any lumps.