In a large mixing bowl use an electric whisk or a stand mixer to cream the butter together with the sugar.
Add the eggs and almond essence. Whisk until smooth.
Mix in the flour, cornstarch, and salt until it stiffens up.
Cover the dough with plastic wrap and refrigerate for 2 hours.
Line a baking tray with parchment paper.
Take the dough out of the fridge. Break off pieces and form them into finger shapes.
Press an almond into one end to resemble a fingernail. Place it on the baking tray. Use a knife or wooden skewer to cut creases into the fingers to simulate knuckles.
Bake for 15–20 minutes, until the fingers are slightly browned. Take them out and allow them to cool.
Once the cookies have cooled, fill in the gaps between the cookies and the almonds with jam. Strategically place more jam along the finger to simulate blood.