Buttered egg

Buttered egg The yogurt with white butter is boiled with slow fire, put into a cloth bag, squeezed out with sour water, then made into pieces or noodles, and dried to obtain buttered egg. Buttered eggs are hard and sour, and they are eaten with milk tea and fried rice. When chewed, the sour taste is fragrant.
Reprinted with attribution： https://cnlocality.com/(Chinese Specialty Products)