Preheat the oven to 350 degrees + lightly grease the pan and line with parchment paper
In a medium mixing bowl, whisk together until smooth the egg, granulated sugar, brown sugar, pumpkin, oil, + vanilla.
Add in flour, baking powder, baking soda, pumpkin pie spice, + salt
Sprinkle on cinnamon sugar and swirl around with a toothpick
Bake for 45 mins + let cool for 10-15 mins
