These Pumpkin Snickerdoodles only feature 3/4 cup of pumpkin puree, but they are vivid orange. The primary flavor is all Snickerdoodle–cream of tartar and cinnamon–with the pumpkin very much there but mild. [Note that I recommend avoiding canned organic pumpkin puree here, as it tends to be watery.]
Preheat oven to 375-degrees. In a medium bowl, whisk together flour, cream of tartar, baking soda, salt, and pumpkin pie spice; set aside.
In a large bowl, cream the butter and the 1 1/2 cups white sugar until light and fluffy. Add the egg, then the pumpkin puree. Add the dry ingredients last, scraping down the bowl as needed.
Combine the two topping ingredients in a small bowl. Using a tablespoon, form dough into a ball and roll in the sugar and cinnamon. Space out the dough balls on the cookie sheet so that they have room to spread.
Bake for 8 to 10 minutes, until edges are set; since the cookies are tinted orange, it will be harder to judge doneness, but Snickerdoodles always finish cooking outside of the oven. Cool the cookies on baking sheet about 10 to 15 minutes before moving to rack.
OM NOM NOM!