Preheat oven to 325 degrees.

In a medium bowl, mix together almond flour, coconut flour, baking powder, sea salt, cinnamon and xanthan gum. Mix well and set aside.

In a large bowl, add butter, sweetener, vanilla and egg. Using a hand beater, mix until combined.

Add flour mixture to egg mixture and continue beating with hand beaters.

Roll dough into 1 - 1 1/2 inch balls and gently flatten in your hand.

Place on a cookie sheet.

Bake for 20 minutes or until lightly golden brown.