Preheat oven to 350°F (175°C) and grease four mini loaf pans or line with parchment.
Whisk pumpkin puree, sugars, eggs, oil, and vanilla until smooth.
In another bowl, mix flour, baking soda, baking powder, salt, pumpkin pie spice, and cinnamon.
Combine wet and dry ingredients gently until no streaks remain.
Pour half the batter into pans, sprinkle half of the cinnamon sugar mixture, then top with remaining batter and swirl lightly.
Bake 20–25 minutes, or until a toothpick comes out clean.
Cool 10 minutes, then transfer to a rack to cool completely.