Preheat your oven to 350°F and line two baking sheets with parchment paper.
In a large bowl, cream together the softened butter and sweetener until light and fluffy, about 2-3 minutes.
Add eggs one at a time, beating well after each addition, then mix in the vanilla extract.
In a separate bowl, whisk together the coconut flour, baking powder, salt, and cinnamon if using.
Gradually add the dry ingredients to the wet ingredients, mixing until a smooth dough forms.
Roll dough into 1-inch balls and place on prepared baking sheets, spacing them 2 inches apart. Gently flatten each ball with the bottom of a glass or your palm.
Bake for 10-12 minutes until edges are lightly golden. Let cool on the baking sheet for 5 minutes before transferring to a wire rack.