Place all of the ingredients into a food processor and process until they form a ball of dough

Dust your worktop with flour and roll the dough out until it is 5mm thick

Prick all over with a fork and then cut into rectangles, 5cm x 2.5cm, using a sharp knife

Place onto a lined baking tray and rest in the fridge for 30 minutes

Preheat the oven to 160° Celsius

Dust with caster sugar – do not do this if you are using fructose as they will be too dark

Bake for 16 minutes

Cool completely before removing from the tray