Whisk the flour, cornstarch, cream of tartar, baking soda, baking powder, dough cinnamon, nutmeg, ginger, salt, cloves, and allspice together.
Cream the butter, granulated sugar, and brown sugar until fluffy, about 2 minutes.
Mix in the egg yolk, then the pumpkin and vanilla.
Mix in the dry ingredients on low just until combined, then scrape the bottom of the bowl by hand.
Cover and chill the dough for 3 hours, or freeze it for 45 minutes.
Heat the oven to 350 degrees F. Line two baking sheets. Mix the coating sugar and cinnamon.
Scoop two tablespoons of dough, roll into balls, coat in cinnamon sugar, and space 2 inches apart.
Bake for 10 to 13 minutes, until set with cracking tops and slightly underbaked centers. Cool 5 minutes on the sheet, then transfer to a rack.