Preheat the oven to 400°F and line two baking sheets with parchment paper.
In a large bowl, cream the butter, white sugar, and brown sugar.
Add the eggs and vanilla and mix until light and fluffy, about 2-3 minutes.
In a separate bowl, whisk together the flour, cream of tartar, baking soda, pumpkin pie spice, and salt.
Add the dry ingredients to the wet ingredients and mix until just combined into a soft dough.
In a small bowl, stir together the sugar and cinnamon for the coating.
Scoop the dough into 2-ounce balls and roll each one in the cinnamon-sugar mixture until fully coated.
Place the dough balls on the prepared baking sheets, spacing them about 2 inches apart (it's best to cook 6 cookies per pan to prevent them from spreading into each other).
Bake for 8-10 minutes, until the edges are just set. Let cool on the baking sheet for 5 minutes before transferring to a wire rack to cool completely before eating.
Notes
Save time/prep ahead:
Make the dough ahead. Prepare the cookie dough, roll it into cookie dough balls, and refrigerate for up to 24 hours before baking. Let the dough sit at room temperature for a few minutes if it's too firm to roll or coat.
Freeze the cookie dough. Roll and coat the dough balls in the cinnamon sugar mixture, then freeze them on a parchment-lined baking sheet. Once solid, transfer to a freezer-safe container or bag and bake from frozen when you're ready.
Prep the cinnamon sugar mixture ahead. Combine the granulated sugar and cinnamon in a small bowl and store it covered until you're ready to roll the cookies.
The recipe can be found on My Fitness Pal by searching "BWB Pumpkin Spice Snickerdoodles." The nutrition content provided for each recipe is an estimate created through the My Fitness Pal database. Please be aware that the nutritional content of each recipe may vary based on the products you use, the precision of your measurements, and the source you use to obtain nutrition data. While we try to provide accurate information, we give no guarantee regarding the accuracy of the nutritional information provided.