How do I go about to use a substitute for sugar?
So there are a couple substitutes for sugar in baking. One option to replace sugar is Xylitol, which you should be able to buy at your local health store or at Wellness Warehouse (http://www.wellnesswarehouse.com/shop/?var=3659#page=page-1). I have used this personally before and it is great!
Alternatively you can use a natural sugar such as coconut sugar, however this does contain sucrose. You can buy coconut sugar here: http://www.yuppiechef.com/3-chefs.htm?id=10191&name=3-Chefs-Coconut-Sugar-450g
Hope this helps, good luck!
Xylitol. 1:1 replacement, and it has very little kJ.