01 - Preheat oven to 350°F. Line a baking sheet with parchment paper.
02 - Whisk together almond flour, coconut flour, baking soda, and salt in a medium bowl until evenly blended.
03 - Beat the softened butter and erythritol in a large bowl using an electric mixer until mixture is light and fluffy.
04 - Add the egg and vanilla extract to the butter mixture. Mix until fully combined.
05 - Gradually add dry ingredients to wet mixture, mixing until a dough forms.
06 - Fold in sugar-free chocolate chips until evenly distributed throughout the dough.
07 - Scoop tablespoon-sized portions of dough onto prepared baking sheet, spacing 2 inches apart. Flatten each with your palm.
08 - Bake in the preheated oven for 10 to 12 minutes, or until edges are golden and centers are set.
09 - Allow cookies to cool on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely.