Tried it twice. Both were on the airplane during long flights so hopefully it didn’t effect things too much. It is, regardless, a very fickle tea. I found that the caramel flavor had more of a presence while the water was hot but as it cooled off the vanilla flavor took over. My second steep was a bit bitter due to floating leaves but still drinkable.
Preparation
150 °F / 65 °C
2 min, 45 sec