Instructions
Step 1
Make the pumpkin spice: In a small bowl, stir together the cinnamon, ginger, nutmeg, allspice, and cloves.
Step 2
Make the cookies: In a medium bowl, whisk together the flour, 1 tablespoon of the pumpkin pie spice, the baking soda, cream of tartar, and salt. In a large bowl using a hand mixer, or in the bowl of a stand mixer fitted with a paddle attachment, beat together the butter and brown sugar on medium speed until light and fluffy, about 3 minutes. Add the egg yolks and continue beating, scraping down the bowl and mixer occasionally, until completely incorporated, then beat in the pumpkin purée and the vanilla. Add the flour mixture ingredients and continue mixing just until combined.
Step 3
Line 2 large baking sheets with parchment paper. Scoop the dough into twenty 2-tablespoon portions (about 1¼ ounces each). Position the portions on the lined baking sheets about 1½ inches apart, then transfer to the fridge until the dough is firm, about 2 hours.
Step 4
Meanwhile, in a medium bowl, stir together the remaining pumpkin spice and the sugar. Position one rack in the top third of the oven and another in the bottom third, then preheat to 350°F.
Step 5
Bake the cookies, rotating and switching the top and bottom sheets halfway through, until puffed and lightly golden but still soft, 12–14 minutes. Cool slightly, then transfer to a wire rack to cool completely.