Cream together the softened butter and granulated sugar in a mixing bowl until the mixture is light and fluffy, and smells slightly sweet, about 2-3 minutes.
Beat in the egg and vanilla extract until well combined, resulting in a smooth, slightly glossy batter.
In a separate bowl, whisk together the sifted flour, baking powder, and salt to ensure even distribution.
Gradually add the dry ingredients to the wet mixture, mixing just until the dough begins to come together and is manageable — it should be soft but not sticky.
Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper for easy removal.
Divide the dough into 12 equal portions. Roll each portion into a slender, finger-like shape, about 4 inches long, tapering slightly at one end to resemble a knuckle.
Place each shaped dough on the prepared baking sheet, spacing them apart to prevent touching as they expand slightly during baking.
Use a fork to gently score the top of each cookie to create a cracked, aged knuckle effect. Press a small almond slice onto the tip of each finger for a realistic fingernail.
Bake the cookies for about 15 minutes, or until they are golden brown and have cracks resembling aged skin.
Remove the cookies from the oven and allow them to cool on the baking sheet for a few minutes until firm, then transfer to a wire rack to cool completely.
Once cooled, serve these creepy, realistic finger cookies as a startlingly spooky treat for Halloween festivities.
