Place the butter, sugar and orange zest in a bowl and beat until pale and creamy using either a handmixer or stand mixer with the paddle attachment.
Sift in the flour, cornflour, salt and add the finely chopped dried cranberries and beat until just combined. Don’t over mix.
Form the dough into a ball, wrap in cling film / plastic wrap, and place it in the fridge for 30 minutes or up to 48 hours.
Preheat the oven to 140 ℃ fan / 160˚C / 325˚F.
Line 3 baking trays with baking parchment and set aside.
Roll the dough out between two sheets of baking parchment to a thickness of ¼ inch (6mm).
Using a 3 inch star shaped cookie cutter, cut out stars and carefully place them on the lined trays.
Re-roll the scraps of dough and continue to cut out stars until all the dough is used.
Bake the cookies for 12-14 minutes, until lightly golden at the edges.
Cool the cookies on the trays for 10 minutes, then move to a wire rack to cool completely.
Once the cookies are cold, melt the white chocolate. Either place the chopped chocolate in a heatproof bowl over a pan of simmering water, making sure the bowl doesn’t touch the water, and slowly melt. Or place the chocolate in a microwave safe bowl and melt for 20 seconds, stirring in between, until melted and smooth.
Drizzle the white chocolate over the cookies and leave the chocolate to harden at room temperature.
Store cookies in an airtight container at room temperature for up to 2-3 days.