01 - Preheat oven to 350°F and line a baking sheet with parchment paper.
02 - In a medium bowl, whisk together almond flour, coconut flour, erythritol, cinnamon, baking powder, and salt until well blended.
03 - In a large bowl, beat the softened butter until creamy. Add the egg and vanilla extract; beat until smooth and fully incorporated.
04 - Gradually stir the dry mixture into the wet mixture until a soft, pliable dough forms. Mix gently to avoid overworking.
05 - Scoop tablespoon-sized amounts of dough and roll into balls. Place on the prepared baking sheet, spacing 2 inches apart to allow for spreading.
06 - Flatten each ball slightly with your fingers or the tines of a fork to create an even thickness.
07 - Bake for 12-15 minutes, until the edges are lightly golden and the centers are set.
08 - Let cookies cool on the baking sheet for 5 minutes before transferring to a wire rack to cool completely. This helps them set and develop their crisp texture.