Preheat the oven to 350°F and line two baking sheets with parchment paper.
In a medium bowl, whisk together the flour, salt, baking soda, cream of tartar, and pumpkin pie spice until well combined.
In a large mixing bowl, cream the butter, granulated sugar, and brown sugar until light and fluffy.
Beat in the vanilla extract and egg until smooth.
Gradually add the dry ingredients to the wet ingredients, mixing until just combined.
Cover the dough and chill for at least 30 minutes.
In a small bowl, stir together the granulated sugar and cinnamon for rolling.
Scoop out about 2 tablespoons of dough, roll into a ball, and coat in the cinnamon-sugar mixture.
Place the coated dough balls 2 inches apart on the prepared baking sheets.
Bake for 10–12 minutes, or until the edges are lightly browned.
Allow cookies to cool on the baking sheet for 5 minutes before transferring to a wire rack to cool completely.