01 - Preheat the oven to 350°F and line a baking sheet with parchment paper.
02 - Whisk together almond flour, coconut flour, erythritol, baking powder, and salt in a medium bowl.
03 - Beat softened butter until creamy, then add the egg, vanilla extract, and peppermint extract; mix until fully combined.
04 - Gradually incorporate the dry ingredients into the wet mixture, mixing until a soft dough forms.
05 - Divide the dough in half; add red food coloring to one half and knead gently to combine.
06 - Roll small pieces of plain and colored dough into 4-inch ropes, twist together, and shape into candy cane or swirl forms. Place on prepared baking sheet.
07 - Optionally, sprinkle crushed sugar-free peppermint candy atop each shaped cookie.
08 - Bake cookies for 10 to 12 minutes until edges are lightly golden. Cool on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely.