As early as more than 3000 years before BC, the ancient nomadic people living in the Turkish plateau had already made and drunk yogurt. The original yogurt may have originated by accident. At that time, goat's milk often deteriorated during storage, which was caused by bacteria polluting goat's milk, but once yeast in the air occasionally entered goat's milk, it changed goat's milk and became more sweet and sour. This is the earliest yogurt. The shepherd found this kind of yogurt delicious. In order to continue to get yogurt, it was inoculated into boiled and cooled fresh goat milk, and after a period of culture and fermentation, a new yogurt was obtained.

More than 2000 years ago BC, the ancient Thracians living in northeast Greece and Bulgaria also mastered the technology of making yogurt. They started with goat's milk. Later, yogurt technology was spread to other parts of Europe by the ancient Greeks.