Line a large baking tray with baking parchment. In a bowl, beat together the butter and sugar until creamy and well blended. Beat in the Caramel Flavour.
Sift the flour and cornflour on top and stir into the creamed mixture, then bring the mixture together with your hands to form a firm dough. Turn on to a lightly floured work surface and knead gently until smooth.
Cut the dough in half and divide each half into 9 portions. Working on one portion at a time, roll the shortbread gently, back and forth on the work surface to form a skinny finger shape approx. 10cm (4inches) long.
Pinch the dough in 2 places to make the bony joints and then score with a knife to make the wrinkles. Place on the baking tray whilst you work on the remaining pieces. Keep the fingers spaced a little apart on the tray. You can make the fingers different lengths and shape them with a bend to make "crooked" fingers. As a rule, the thinner you roll the shortbread mixture, the less it spreads during cooking.
Make up the Egg White Powder as directed and whisk until slightly frothy. Brush over the top of each finger. Gently press an almond into the top of each finger to resemble fingernails. Chill for 30 minutes.
Ten minutes before baking, preheat the oven to 180˚C (160˚C fan assisted oven, 350˚F, gas mark 4). Brush the rest of the fingers with Egg White, leaving the almond unbrushed.
Squeeze a few drops of Red Food Colour Gel into a small dish and using a paint brush, carefully paint it over the almonds. Bake for about 20 minutes until very lightly golden. Cool for 5 minutes before transferring to a wire rack to cool completely. Your real shortbread fingers are now ready to serve and spook your friends!