01 - Preheat oven to 325 degrees Fahrenheit. Line a baking sheet with parchment paper.
02 - In a medium bowl, whisk together blanched almond flour, coconut flour, powdered erythritol, baking powder, and fine sea salt until well combined.
03 - In a large bowl, cream softened unsalted butter with the egg, vanilla extract, and almond extract until smooth using an electric mixer or whisk.
04 - Gradually add the dry mixture to the wet ingredients, mixing until a soft, uniform dough forms.
05 - Scoop approximately 1 tablespoon of dough per cookie. Roll each portion into a finger shape, creating knuckle indentations with fingers or a small knife for detail.
06 - Press a whole blanched almond firmly into one end of each shaped cookie to resemble a fingernail.
07 - Optional: brush a small amount of sugar-free jam at the base of each almond for a realistic 'bloody' effect.
08 - Place cookies on the lined baking sheet, spacing slightly apart. Bake for 16 to 18 minutes or until edges are just golden.
09 - Allow cookies to cool on the baking sheet for 10 minutes, then transfer to a wire rack to cool completely before serving.