Interesting. According to this article, which I just looked up: https://en.wikipedia.org/wiki/Butter_tea https://en.wikipedia.org/wiki/Butter_tea they did ori

Interesting. According to this article, which I just looked up: https://en.wikipedia.org/wiki/Butter_tea https://en.wikipedia.org/wiki/Butter_tea they did originally use yak butter, and still do, but increasingly do use butter made from cow milk, since it is more available now. Maybe you saw a case of that. Update: Just searched again and found a few more interesting links. Also, they (Tibetans) pour the butter tea into their tsampa, also a staple food among them: https://www.eater.com/2016/8/25/12624068/butter-coffee-tea-tibet-yak https://www.eater.com/2016/8/25/12624068/butter-coffee-tea-t... http://www.teafoodhistory.com/tibetan_tea.html http://www.teafoodhistory.com/tibetan_tea.html http://www.npr.org/sections/thesalt/2015/05/05/404435137/tea-tuesdays-butter-up-that-tea-tibetan-style http://www.npr.org/sections/thesalt/2015/05/05/404435137/tea... https://en.wikipedia.org/wiki/Tsampa https://en.wikipedia.org/wiki/Tsampa