01 - Preheat oven to 350°F and line a baking sheet with parchment paper
02 - Whisk almond flour, erythritol, cinnamon, salt, and baking powder in a large bowl until evenly distributed
03 - Beat softened butter until creamy in a separate bowl, then add egg and vanilla extract, mixing until fully incorporated and smooth
04 - Pour wet mixture into dry ingredients and stir until a soft, cohesive dough forms
05 - Scoop tablespoon-sized portions of dough, roll into balls, and place on prepared baking sheet 2 inches apart
06 - Gently press each ball flat with palm or glass bottom, then sprinkle with cinnamon-erythritol topping mixture if using
07 - Bake for 12-15 minutes until edges turn golden brown
08 - Let cookies rest on baking sheet for 10 minutes, then transfer to wire rack to cool completely before serving