Preheat your oven to 350 degrees F and line a baking sheet with parchment paper, or grease a baking sheet.

In a mixing bowl, combine cake mix, pumpkin puree, egg and pumpkin pie spice. Mix until combined well. Using a two tablespoon portion scoop, scoop batter onto prepared baking sheet, keeping cookies 2" apart. Bake for 15-18 minutes or until set. Remove from oven and let cool on baking sheet for 2 minutes before transferring to a cooling rack to cool completely.

Sprinkle with powdered sugar before serving.