Place the 1/2 cup canned pumpkin in between a few layers of paper towels and gently squeeze to remove as much of the liquid as you can. Repeat, then set aside.
In a mixing bowl, whisk together the flour, baking soda, cream of tartar, salt, cinnamon, ginger, nutmeg and cloves until well combined.
In a separate bowl, whisk together the melted butter, brown sugar, granulated sugar, pumpkin, egg yolk and vanilla until all combined.
Add the dry ingredients to the pumpkin mixture and stir until ingredients are well combined.
Cover cookie dough with plastic wrap and place in the refrigerator to chill for at least 30 minutes, but up to 48 hours.
When ready to bake, preheat oven to 350 and line two cookie sheets with parchment paper.
In a small bowl whisk together the sugar and cinnamon for the topping.
Remove the dough from the refrigerator and scoop with a 2 Tbsp cookie scoop in to balls.
Roll each ball generously in the cinnamon sugar topping mixture and place on the prepared baking sheets at least 2 inches apart.
Bake at 350 for 11-12 minutes then remove from the oven, and let the cookies cool on the baking sheets until completely cooled before serving.