My senior year of college I was addicted to rootbeer floats. I made them like all the time.
Now there is a very important thing we have to keep straight.
You can't use vanilla bean ice cream.
You should aim for french vanilla or classic vanilla.
In all my rootbeer float experience, I have discovered that classic vanilla or french vanilla is the best type to use for rootbeer floats.
I'm not sure why. It just is.
I don't have a specific type of rootbeer that I like to use, but the kind that comes in glass bottles always looks the fanciest and therefore you should aim to use that kind also.
YUMMMMM! Refreshing and crisp.