Loosen the mixture from the edges of the tin with a hot knife. Turn out onto a board dusted with the remaining icing sugar and cornflour, and cut into 3cm squares, rolling each in the sugar and corn flour. Store in an airtight container for up to 3-4 days.
If you'd like more inspiration for giftables, why not try making our Cupcakes in a Jar?
Click here for the recipe