Kitchen tip
Try to use real Parmigiano-Reggiano if you can; the generic stuff will give your shortbread a more crumbly texture.
Kitchen tip
Leave shortbread squares to cool overnight in the oven for a crisper texture.
Storage tip
Keep in an airtight container at room temperature up to 5 days, or freeze up to 1 month.
Read all our best cookie storage tips here.