In a bowl, beat together the butter, sugar, egg, almond extract, and vanilla extract until well combined.
Gradually mix in the flour, baking powder, and salt until a dough forms.
Add a few drops of green food coloring, mixing until you reach your desired shade of green.
Cover the dough and refrigerate for 30 minutes to firm up.
Roll heaping tablespoons of dough into finger shapes for each cookie.
Press an almond firmly into one end for the "nail," then squeeze the center to create a knuckle shape. Use a paring knife or toothpick to make several indents for knuckles.
Place the cookies on lightly greased or parchment-lined baking sheets.
Bake in a preheated 325°F (160°C) oven for 20-25 minutes or until pale golden. Let cool for 3 minutes, then add red decorator gel under the almond for a creepy effect. Enjoy!