In a medium bowl, whisk together flour, baking soda, salt, and pumpkin pie spice. Set aside.
In a medium bowl, whisk together sugar, pumpkin puree, egg, vegetable oil, and milk.
Pour the flour mixture into the wet ingredients and use a wooden spoon to stir until just mixed. Transfer batter to prepared loaf pan.
Sprinkle cinnamon sugar over the top of the batter.
Bake for 32 to 38 minutes, until toothpick inserted into the center of the loaf comes out clean and the top of the bread springs back when lightly pressed.
Cool in the pan until cool enough to handle and then transfer to a cooling rack. Cool for an additional 10 minutes, serve, and enjoy!