As the flour has already been roasted Tsampa is quite simple to prepare and does not need to be cooked; indeed, it is known as a convenience food and often used by the Tibetans, Sherpas, nomads and other travellers.
André Migot described its preparation: You leave a little buttered tea in the bottom of your bowl and put a big dollop of tsampa on top of it.
The whole operation demands a high degree of manual dexterity, and you need a certain amount of practical experience before you can judge correctly how much tsampa goes with how much tea.
[2]Besides constituting a substantial, arguably predominant part of the Tibetan diet, its prominence also derives from the tradition of throwing pinches of tsampa in the air during many Buddhist rituals.
Tsampa is also known among Tibetan sportsmen for its ability to provide rapid energy boosts; the roasting of the flour breaks it down to an easily digestible state, allowing the calories therein to be quickly incorporated by the body.