So lets say that I have a secret ingredient that I want to incorporate into my beer. It's a liquid boiled from water and plant matter, but aside from the flavor aspect I suspect that it contains sugar, but I don't know what kind of sugar, and whether they are fermentable......
How does one proceed? The only thing I can think of is to put it in an erlenmeier and introduce some yeast and see what happens, but there has to be a better way.