Combine the butter, sugar, egg, almond extract and vanilla extract in a mixing bowl. Beat together with an electric mixer; gradually add the flour, baking powder and salt, continually beating; chill for 20 to 30 minutes.
Preheat oven to 160 C / Gas mark 3. Lightly grease baking trays.
Remove dough from fridge in small amounts. Scoop 1 heaping teaspoon at a time onto a piece of greaseproof paper. Use the paper to roll the dough into a thin finger-shaped biscuit. Press one almond into one end of each biscuit to give the appearance of a long fingernail. Squeeze biscuit near the tip and again near the centre of each to give the impression of knuckles. You can also cut into the dough with a sharp knife at the same points to help give a more finger-like appearance. Arrange the shaped biscuits on the baking trays.