Preheat oven to 350*F . Line a baking sheet with parchment.
In a small bowl combine the sugar and cinnamon to roll the cookies. Set aside.
3 Tbsp Granulated Sugar, ¾ tsp Cinnamon
In a large bowl using a hand mixer, or in the bowl of a stand mixer fitted with the paddle attachment, cream the vegan butter and brown sugar until well combined and fluffy.
8 Tbsp Vegan Butter, 1 Cup Light Brown Sugar, tightly packed
Add the pumpkin purée, non-dairy milk and vanilla and mix on low until well combined.
⅓ Cup Pumpkin Purée , ½ tsp Vanilla Extract, 1 Tbsp Non-Dairy Milk
Then, add the flour, cornstarch, pumpkin pie spice, baking powder, baking soda, and salt and mix until just combined.
1 ½ Cups All-Purpose Flour, 2 ½ tsp Pumpkin Pie Spice, ½ tsp Baking Powder, ½ tsp Baking Soda, ¼ tsp Kosher Salt, 1 Tbsp Cornstarch
Use a 3-tablespoon cookie scoop to scoop a cookie dough ball into the bowl of cinnamon sugar. Roll the dough ball around to coat it, then place it on a parchment-lined baking sheet. Continue until you have 8 cookie dough balls, evenly spaced, on the cookie sheet.
Bake in a 350*F oven for 13-15 minutes. The edge of the cookies should feel set when pressed with a finger. Allow the cookies to cool on the baking sheet for 10 minutes, then transfer to a cooling rack to finish cooling.
Repeat with the remaining cookie dough.