Previously we replaced the castor sugar for coconut ginger sugar (http://cocobono.com/products/coconut_ginger.html). This time normal castor sugar was used, so we sprinkled the biscuits whilst still hot with some coconut ginger sugar, which gave them more punch…! If you can buy coconut ginger sugar then I highly recommend.
If using ginger sugar you won’t need the ground ginger.
Recipe by Gillianskitchen.com