Preheat the oven to 170°C/ 150°C fan/ gas mark 3/ 325°F
Line a 20cm square tin with baking parchment or magic liner
Roughly chop the cranberries (they will get chopped more later).
For the Christmas Shortbread:
In a food processor, blitz the butter, sugar, flour and pinch of salt until the mixture begins to clump together. The mixture won't be a solid lump
Add the orange extract and zest, and cranberries and pulse to combine
Press mixture into the prepared tin and level (using your hands or the back of a spoon is easiest). You need to push quite hard to firm up the dough
Prick dough well with a fork
Bake the shortbread for 45-50min or until nicely golden.
While it’s still warm, cut the shortbread in half across the middle. Then cut each half into 10-12 fingers about 1.5-2cm (¾ inch) wide
Cool completely in the tin.
For the decoration (optional):
Arrange the biscuits on a wire cooling rack set over a tray
Melt the chocolate in a heatproof bowl over a pan of barely simmering water or in 30-second bursts in the microwave.For step-by-step instructions see How to Melt Chocolate
Using a spoon, pour chocolate onto one end of each shortbread finger and gently spread with a knife. Decorate and leave to set for about an hour, or chill for about 20 minutes
Store in an airtight tin in a cool place, or in a sealed box in the fridge for up to a week.