Preheat oven to 350 degrees Fahrenheit. Line a baking sheet or cookie sheet with parchment paper or a silicon mat.
Put flour, salt, baking soda, and cream of tartar in a mixing bowl. Add pumpkin spice, cinnamon, ginger, allspice, clove, and nutmeg. Whisk till combined.
Put butter, sugar, and brown sugars in a separate mixing bowl. Cream together in a stand mixer or with hand mixer till smooth, about 4-5 minutes.. Add vanilla and egg. Stir till combined. Do not over mix!
Add the flour mixture to the creamed mixture. Mix until just combined or until the flour disappears.
Chill dough in refrigerator for about 1 hour.
Stir pumpkin spice and sugar together in a shallow bowl.
Using a cookie scoop, scoop dough into 2 tablespoon balls. Roll in pumpkin spice-sugar mixture to coat all sides. Roll into ball and place on prepared baking sheet, 3 to 4 inches apart. Flatten slightly. I like to use the bottom of a glass.
Bake in oven until browned, 10 to 12 minutes. It could take longer depending on your oven.
Cool on baking sheet 5 minutes. Then move to wire cooling rack.