In a medium bowl, combine the almond flour, tapioca starch, cream of tartar, baking soda, and kosher salt. Whisk well to combine and set aside.
In a large bowl, combine the coconut sugar, melted coconut oil, and vanilla extract. Use an electric hand mixer or stand mixer with the paddle attachment on medium speed and beat everything together until combined. The resulting batter will look like wet, brown sand.
Add the room temperature egg and continue beating on medium speed for about 3 to 4 minutes or until the mixture is a lighter golden brown color and the batter is thick and ribbony.
Pour in the flour mixture and beat on low until just combined.
Cover and chill the dough in the fridge for at least 1 hour and up to 3 days.
When you’re ready to bake the cookies, heat the oven to 400°F with the rack in the middle. Then, line two rimmed baking sheets with parchment paper.
Whisk 1 tablespoon blonde coconut sugar and ground cinnamon in a small bowl to make the cinnamon sugar topping.
Using a small ice cream or cookie scoop, portion out 16 cookie dough balls, about 1 tablespoon each.
Shape the pieces of dough into balls by rolling them in your palms. Then, toss the balls in the cinnamon and sugar mixture until well coated.
Arrange 8 of the coated dough balls on each of the prepared baking sheets, staggering them about 2 inches apart. The cookies will flatten and spread as they bake so make sure there is ample space between the cookies.
Bake one tray at a time or until edges are lightly browned and firm but centers are puffed and soft, about 7 to 8 minutes. (Start checking at the 5 minute mark if your cookies are smaller or your oven runs hot!)
Let the cookies cool on the baking sheets for 5 minutes. Then, transfer the cookies to a wire rack and let them cool completely.