01 - Set oven temperature to 350°F and line a baking sheet with parchment paper.
02 - In a medium bowl, whisk together almond flour, coconut flour, erythritol, baking soda, and salt until evenly blended.
03 - In a large bowl, beat the softened butter with the egg, vanilla extract, and peppermint extract until creamy and smooth.
04 - Gradually incorporate the dry ingredients into the wet mixture, stirring until a soft dough is formed.
05 - Scoop one tablespoon portions of dough, roll into balls, place on prepared baking sheet, and gently flatten with your palm.
06 - Bake for 10 to 12 minutes until the edges are lightly golden. Remove and allow cookies to cool completely on the baking sheet.
07 - Drizzle the cooled cookies with melted white and dark chocolate chips, then sprinkle with crushed peppermint candies if desired. Let the chocolate set before serving.