Thong yip (thai: ทองหยิบ, pronounced [tʰɔ̄ːŋ jìp]), also known as "pinched gold egg yolks" in english, is one of the nine auspicious traditional thai desserts. it is usually made for important occasions and ceremonies such as weddings, ordinations, and housewarmings. thong yip, like many other egg-based sweets, was introduced by japanese-portuguese maria guyomar de pinha in the reign of somdet phra narai maharat during the ayutthaya kingdom. its origin is the portuguese sweet called trouxas das caldas.

Source: Wikipedia