I don't have it down yet. I just switched to vanilla to try out. Roomate used to work at BlueBottle. Told me that you really want to stay away from extracts, theyd infuse their own simple syrups with vanilla beans.

I think peppermint oil should work. Would be better if I used peppermint simple syrup I think tho. just more surface area.

Iced coffee might not matter if you're doing a lot of milk tho!

Have you tried making your own overnight cold brews yet?