01 - Preheat the oven to 350°F. Line a baking sheet with parchment paper.
02 - In a large mixing bowl, whisk together the almond flour, coconut flour, erythritol, baking powder, and salt until evenly combined.
03 - In a separate bowl, whisk together the melted butter, egg, and vanilla extract until smooth.
04 - Pour the wet ingredients into the dry ingredients and mix until a thick dough forms.
05 - Fold in the chopped pecans until evenly distributed throughout the dough.
06 - Scoop out tablespoon-sized portions of dough and roll into balls. Place them 2 inches apart on the prepared baking sheet.
07 - Flatten each ball gently with your palm or the bottom of a glass to about 1/2-inch thickness.
08 - Bake for 13–15 minutes, or until the edges are golden and the centers are set.
09 - Allow the cookies to cool on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely. They will crisp up as they cool.