Must be that time of year! I made a porter and then read on the site about adding vanilla. To get some of both, last weekend I bottled 1.5 gals of the porter and then added 1 fl oz of pure vanilla extract to the remaining 3.5gals. I intended to bottle the rest the next day...but did not. Just now tasted it from the secondary and it only has a very small hint of vanilla...the bittering comes thru. Since I'm wanting more, I just added another ounze of vanilla extract and should bottle it tomorrow. I think people usually say 1-2 oz of extract per 5gal, but tastes vary. Don't know if any of this helps.