To make the shortbread, preheat the oven to 165℃
Add the flour, golden caster sugar and cubed butter to a large mixing bowl.
Use the 'rubbing in' method to rub the ingredients together until it resembles breadcrumbs.
Add the ground almonds and one egg yolk, mix with your hands until a dough is formed.
Cover in cling film and chill in the fridge for thirty minutes.
Take it out of the fridge and roll it out to 1/2 cm thick. Use a cutter to cut cookie shapes.
Place the shortbread onto a tray lined with baking paper, sprinkle with golden caster sugar and bake for 20 minutes.
leave to cool for ten minutes before transferring to a cooling rack to cool completely.