Preheat the oven to 350°F and line a baking sheet with parchment paper.

In a medium bowl, whisk together the cake mix and pumpkin pie spice, then stir in the pumpkin puree.

Fold in chopped pecans if using, then scoop the dough with a 2-tablespoon cookie scoop onto the prepared baking sheet, leaving about an inch between cookies.

Bake for 11-13 minutes, or until a toothpick inserted in the center comes out clean. Cool completely on a wire rack.

Frost with vanilla frosting if desired and garnish with additional pumpkin pie spice before serving.