Finding, making and tasting Good Root Beer!

I am looking for a good root beer recipe. This began because a root beer spirit I like called Art In the Age Root was getting hard to find. I would like to have a recipe or recipes that can be used in the following ways: as a tea, beer ingredient, soda and as a spirit infusion. To me was gives root beer it wonderful flavor is wintergreen and sarsaparilla. Yes I know there are issues around using those two plants. Any root beer recipe is welcome and tasting notes are welcome too.

In university, I experimented with making traditional mildly alcoholic ginger ale. I liked this prof's recipe, and he has a recipe for root beer too (didn't try it)

Ginger ale :
https://fankhauserblog.wordpress.com/2000/08/08/making-ginger-ale-at-home/

Root beer:

https://fankhauserblog.wordpress.com/1996/06/28/making-root-beer-at-home/


Notes on alcohol content (spoiler : very low)

We have tested in our lab the alcoholic content which results from the fermentation of this root beer and found it to be between 0.35 and 0.5 %. Comparing this to the 6% in many beers, it would require a person to drink about a gallon and a half of this root beer to be equivalent to one 12 ounce beer.

I would call this amount of alcohol negligible, but for persons with metabolic problems who cannot metabolize alcohol properly, or religious prohibition against any alcohol, consumption should be limited or avoided. However, there are many high school biology labs who have made this beverage without any problems.

I have used Zatarains’s Root Beer Extract and did not like it. To be brief I had digestive issues. I find extracts to be lacking in flavor and can be hard to find. The ginder ale looks good and I will try to make some when I have the time.