Preheat oven to 350°
Line a muffin pan with 12 cupcake liners or spray the muffin pan with a baking spray so the muffins easily release from the pan.
In a medium bowl whisk flour, baking powder, baking soda, and salt.
Add in the pumpkin, oil, eggs, pumpkin pie spice and sugar.
Mix completely with a spatula until all ingredients are combined.
Place 3 tablespoons of batter into each muffin pan compartment.
Sprinkle cinnamon sugar mixture generously over the top of each muffin.
Bake muffins for 25 minutes, test with a toothpick and bake until it comes out clean.
Allow muffins to cool for 5 minutes in the pan, then remove from the pan.