Originally Posted by saramc
Not all extracts are the same, so you really need to do a bench trial before you add to wine.
For vanilla, I find that 5-7 drops of quality vanilla extract (I make my own) per 750ml bottle is quite nice...but then again you always have to trial it because what works in one scenario may not work in the next.
I learned the hard way..... Test with a sample first! I added my extract to a gallon, added too much, tried blending back the rest of the batch to save the gallon, ended up screwing up the entire 5 gallon batch! Yikes!