Cream sugar, pumpkin puree, and butter by hand in a mixing bowl.
Add eggs and vanilla. Cream.
In a separate bowl combine, cream of tartar, flour, baking soda, baking powder, pumpkin pie spice, and salt.
Gradually add this mixture to the creamed mixture and stir until well combined. Add white chocolate chips and mix until well combined.
Refrigerate for 30-45 minutes.
Preheat the oven to 375°F and line a cookie sheet with parchment paper, or spray with cooking spray.
Combine sugar, cinnamon, and pumpkin pie spice in a small bowl. Form dough into small balls and roll in sugar and cinnamon mixture. Place on a greased cookie sheet.
Bake at 375°F for 8 minutes.