Reddit reviews Hires Big H Root Beer Extract, Make Your Own Root Beer - 1 Pack

I used this for a hard root beer once. I used 2 TBSP/gal. A little goes a long way.

I use an extract to make a pretty tasty Root-beer. The extracts vary a bit, so depending on the flavor of Root-beer you like, you may need to try a few different ones. The one I use is Hires Big H It has more of a vanilla taste where other extracts I've tried have more of an Black Licorice flavor. I use 5lbs of Beet Sugar, 1lb Honey, the extract above and 4oz Pure Vanilla extract
I heat about 4 gallons of water to 180, turn off the heat, dissolve the sugar, add the honey and extract. Cool with some ice bringing it up to about 5 gallon. I then put it into a keg with 4oz of pure vanilla extract. Hook up to my CO2 and carbonate.

Not a bad plan there. I'd actually considered buying some original just for my root beer extract. I like to add a bit of Stevia and root beer extract to heated milk when I'm craving some Starbucks (I quit caffeine almost completely, other than a random Chai at said Starbucks).

If you want to try the extract, this one I bought I like: https://smile.amazon.com/gp/product/B00JMJZWI0/ref=oh_aui_search_asin_title?ie=UTF8&th=1

Could be good, but betting you'd need a bit of Stevia or some sweetener or it might taste odd with just original and root beer extract mixed :)

https://www.amazon.com/Hires-Big-Root-Beer-Extract/dp/B00JMJZWI0?th=1