Foi thong is a Thai dessert made by drizzling egg yolks (usually duck egg yolks) through a narrow funnel into a sugary syrup in order to create long and sweet golden strings. Pandan leaves are typically used in the syrup to give it a special flavor.
The word
foi means
thread, and the word
thong means
gold. Once prepared, these fine golden threads are often served at weddings and ceremonies. Just like many other Thai dishes, this one also has Portuguese culinary influences and it's based on a Portuguese treat called fios de ovos.