Yak butter tea, called po cha in Tibet, is one of the most iconic drinks made from yak products, and you can prepare a version at home even without access to fresh yak butter. The traditional recipe uses just three ingredients: strong brick tea, yak butter, and salt, all churned together into a rich, savory drink that Tibetans consume throughout the day. Beyond butter tea, yak milk can also be turned into yogurt and cheese, each with a distinct flavor profile tied to the milk’s unusually high fat and protein content.
Traditional Yak Butter Tea (Po Cha)
The foundation of po cha is a concentrated tea base called chaku. Traditionally, this starts with brick tea from Pemagul, Tibet, a dense, smoky variety sold in compressed blocks. A portion of the brick is crumbled into water and boiled for several hours until it produces a dark, bitter, intensely smoky liquid. This long boil is what gives butter tea its backbone. You can make chaku in large batches and store it for multiple servings.
To assemble a cup, some of the chaku is poured into a tall wooden churn called a chandong, along with a generous piece of yak butter and a pinch of salt. The mixture is churned vigorously for a couple of minutes until the butter emulsifies completely into the tea, creating a smooth, slightly thick drink with no visible fat separation. The result tastes more like a warm, salty broth than a typical cup of tea. It’s meant to be sustaining, not sweet.
Making Po Cha Without Yak Butter
Fresh yak butter is nearly impossible to find outside of Central and South Asia. The best substitute is a combination of organic unsalted cow butter and virgin coconut oil. A good starting ratio is about one teaspoon of butter and one tablespoon of coconut oil per cup, which approximates the higher fat content and creamy mouthfeel of yak butter while adding a mild coconut aroma.
For the tea base, pu-erh tea is the closest widely available stand-in for Tibetan brick tea. It shares the earthy, slightly smoky character you need. Brew it strong: steep loose pu-erh for 5 to 10 minutes, or simmer it for longer if you want to replicate the intensity of traditional chaku. Once you have your strong tea, combine it with the butter and coconut oil in a blender and blend on high for about 30 seconds. A blender does the same emulsifying job as a chandong, producing that smooth, frothy texture without any oily slick on top. Add salt to taste. Start with a quarter teaspoon per cup and adjust.
Yak Milk Yogurt
Yak milk yogurt is a traditional staple across the Tibetan Plateau, and the process relies on natural fermentation rather than commercial starter cultures. Fresh yak milk is left to ferment at cool temperatures, and the microbial communities that drive the process are well adapted to high-altitude, cold environments. The dominant bacteria is Lactobacillus delbrueckii, the same species used in many commercial yogurts, alongside a complex mix of other lactic acid bacteria including Lactococcus and Enterococcus strains.
If you can source yak milk (some specialty farms in the U.S. and Europe now sell it), you can make yogurt at home using a standard method: heat the milk to about 180°F (82°C), let it cool to around 110°F (43°C), stir in a few tablespoons of plain yogurt with live active cultures as your starter, then keep it warm for 6 to 12 hours. The high fat content of yak milk, which ranges from 5.6% to over 7% compared to cow milk’s 2.8% to 4%, produces a noticeably thicker, creamier yogurt without any need for straining. The finished product has a mildly tangy flavor with a slight sweetness that’s different from cow milk yogurt.
Why Yak Milk Products Taste Different
The richness of yak dairy comes down to composition. Yak milk contains roughly twice the fat and 30% to 60% more protein than standard cow milk. Its calcium concentration runs around 1,500 mg per kilogram, compared to 1,000 to 1,300 mg/kg in cow milk. Iron content is dramatically higher, in some breeds over 35 times the amount found in cow milk.
The fat itself has a different profile. Yak milk contains higher levels of conjugated linoleic acid and omega-3 fatty acids than cow milk, along with butyric acid, a short-chain fatty acid that supports gut health. It also carries more of certain antimicrobial compounds. These differences explain why yak butter has a stronger, more complex flavor than cow butter, and why yak cheese and yogurt have a distinctive taste that’s hard to replicate exactly with substitutes.
Other Yak Milk Products Worth Trying
Beyond butter tea and yogurt, yak milk is traditionally made into a hard dried cheese called chhurpi. In its simplest form, you heat yak milk, add an acid like lemon juice or vinegar to curdle it, strain out the whey, press the curds, and dry them. The high protein content of yak milk yields a dense, chewy cheese that can be stored for months or even years without refrigeration. Soft chhurpi is eaten fresh and has a texture similar to ricotta, while hard chhurpi is dried until it becomes rock-solid, meant to be chewed slowly like a snack.
Yak cream can also be separated and churned into butter the traditional way. Because the fat content is so high, yak milk separates more readily than cow milk. The butter that results is pale yellow to white, with a distinctly gamey, grassy flavor shaped by the wild alpine plants yaks graze on. This is the butter that defines authentic po cha, and it’s the single ingredient that’s hardest to replicate at home if you don’t have access to yak dairy.