Dairy-free lemon shortbread biscuits that are crunchy, crumbly and taste just like the authentic Scottish version!
In a large bowl, cream together the sugar, margarine and lemon extract.
Add in the flour and the cornflour. Mix until it begins to stick together then use your hands to press it into a dough. Then gently knead in the lemon zest.
Refrigerate the dough for 30 minutes. This will help it to hold its shape in the oven.
While the dough is chilling, preheat your oven to 180°C (or 160°C if you're using a fan oven) and line a tray with baking paper.
Gently knead the chilled dough to get any cracks out then roll it out to about ½-inch thick on a floured surface. Cut out 3-inch circles, re-rolling leftover dough until it's all used up.
Bake for 22-25 minutes until firm all the way round the edges. The shortbread should still be mostly pale in colour and slightly soft in the middle- it will firm up as it cools.
Sprinkle the extra sugar on top and allow them to cool completely before attempting to remove them from the tray.