Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper or silicone baking mats.
In a large bowl, beat the softened butter, granulated sugar, and brown sugar until light and fluffy.
Add the pumpkin puree and egg to the mixture, and beat until fully combined.
In a separate bowl, whisk together the flour, cinnamon, pumpkin pie spice, salt, and baking soda.
Gradually add the dry ingredients to the wet ingredients and mix until just combined.
In a small bowl, combine the 1/4 cup of sugar with the cinnamon for the coating.
Scoop tablespoon-sized portions of dough and roll them into balls. Then roll the dough balls in the cinnamon-sugar mixture.
Place the dough balls on the prepared baking sheet, spaced about 2 inches apart.
Bake for 10-12 minutes or until the cookies are set and lightly golden around the edges. Let them cool on the sheet for a few minutes before transferring them to a wire rack to cool completely.