The best thing that I found as a sweetener is stevia this is a highly concentrated form of sweetener find at all local herb shops doesn't affect your mixes like cotton candy or other sweeteners. I usually add one drop to every 10 ml. I have gone through many trial and errors but this seems to be the best that I have found. Before you add to your mixes taste a drop so you have a sense of the sweetness this will bring, again add this as a extra drop do not include this as a flavor on any of your mixes.