I have seen some people online using two kits to make one 23L batch of beer with more flavor than a single kit. If you use one kit to make 23L you add the yeast supplied with it and 1kg of dextrose ...
I have the white coopers australian stout 23L kit which recommends the additional 1kg sugar you can add but I know its not recommended. I know most people add 1kg spraymalt but I do not have it right ...
In many kits I've used, the instructions recommend using brewing sugar. Of course it's okay to use other sources of sugar, but I was wondering whether there are any benefits of using brewing sugar ...