Yak butter

Yak Butter is common in the Himalayan regions where the domestic yak is the primary source of dairy. Whole yak milk has nearly twice the fat content of whole cow's milk, producing butter with a texture closer to that of cheese. It is a staple food and trade commodity among herder communities across Nepal, Tibet, China, Mongolia, and Pakistan. 

Yak butter has a rich history throughout Nepal and the Himalayas — it has long been the fuel of Mt. Everest climbers and is a daily staple in the diets of Buddhist monks, who sip on yak butter tea throughout the day.