Ian... said:
I dont brew short, I usually add Demorara or Muscavado to my brew if I want to up the ABV. Been happy with the results. As said, it may not particularly be the brew that the makers intended, but if you like it.... so what. I tried 1kg extra of dark brown muscavado in a St Peters Red Ruby Ale kit once. It gave it a gorgeous treacly flavour and I would certainly do it again. Just stay off the white granulated sugar, that would definitely weaken the flavour of the brew. What ever works for you is fine. Good luck.