Preheat the oven to 350° F. In a large mixing bowl, whisk together the flour, salt, baking soda, cream of tartar, and pumpkin pie spice. Set aside.
In another large mixing bowl, add the butter, granulated sugar, and brown sugar. Mix with a hand mixer until creamy. Add the egg, pumpkin puree, and vanilla extract. Mix until combined.
Gradually add the flour mixture to the butter mixture and mix until combined. Set aside.
In a small bowl stir together the sugar and pumpkin pie spice.
Shape the cookie dough 1 tbsp sized balls (using a small cookie scoop to measure) and roll the dough into the spiced sugar mixture.
Bake for 10 minutes, or until the cookies are golden around the edges.
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