Preheat oven to 350°F and line a baking sheet with parchment paper.
In a medium bowl, whisk together almond flour, tapioca flour, baking soda, cream of tartar and sea salt until thoroughly combined.
In a large bowl, either manually using a fork or a mixer, cream together the plant-based butter and granulated maple sugar until the sugar is fully incorporated.
Place your pumpkin purée in two paper towels to blot out excess moisture. This will prevent the cookies from being too cakey. Add this into the large bowl, along with the egg and vanilla extract. Mix to combine until pumpkin is evenly distributed into the mixture.
Pour dry ingredients gradually into the wet ingredients and mix together just until combined. The batter will appear very wet for cookie dough.
Optional if using a cookie scoop, recommended if not using a cookie scoop: Chill the cookie dough in the fridge for 15-20 minutes to allow it to set. This will make the dough easier to handle when rolling into the cinnamon sugar. However if you are using a cookie scoop, this step is not absolutely necessary.
Use cookie scoop to scoop the dough into 1 tablespoon balls. Drop them into the cinnamon sugar bowl and shake the bowl to allow the dough ball to roll around until completely coated. Gently lift the dough and place in baking sheet, shaping into a round shape and flattening slightly. This will yield about 20-24 cookies.
Bake for 11-13 minutes. Let cool for 10 minutes on pan before transferring to cooling rack to cool completely. Enjoy once cooled.