Foi Thong
ฝอยทอง
Foi Thong is golden egg threads — delicate strands of egg yolk and sugar syrup piped into boiling sugar and shaped into intricate nests, a Portuguese-influenced royal Thai dessert.
Cultural Origin
Foi Thong, golden egg-yolk threads, was introduced to the Ayutthaya court in the 17th century by Maria Guyomar de Pinha, a Portuguese-Japanese-Bengali cook who served at the court of King Narai. The dessert remains a marker of Portuguese influence on Thai palace sweets and is essential at weddings and auspicious ceremonies.
Allergens & Sensitivities
Key Ingredients
- egg yolks
- sugar syrup
- jasmine-scented water
Taste profile
- Salty
- fish sauce, soy, shrimp paste
- Sweet
- palm sugar, coconut
- Sour
- lime, tamarind, fermentation
- Umami
- dried shrimp, fermented pastes, stock
The texture is the point rather than the flavour — fine, silky strands that dissolve almost instantly, carrying an intense egg-yolk richness far more concentrated than the light syrup they were cooked in.
How Foi Thong Is Made
- 1
Preparing the yolks
Egg yolks are separated and strained through cloth until completely smooth, removing any membrane that would make the strands break.
- 2
Preparing the syrup
Sugar syrup is brought to a steady boil, thin enough for threads to form but hot enough to set them quickly.
- 3
Piping
The strained yolk is poured through a cone with fine holes directly into the boiling syrup, drawn in a continuous circular motion.
- 4
Setting
The yolk sets into thin threads within seconds of hitting the syrup.
- 5
Lifting and shaping
The cooked threads are lifted out with two long sticks and gathered into loose nests while still pliable.
- 6
Draining
The shaped nests are left to drain and firm up before serving.
When It’s Eaten
Eaten in small amounts as a garnish or accompaniment to other desserts rather than as a dish on its own, and a fixture at weddings and ordination ceremonies rather than everyday eating.
How to Order It
- ขอฝอยทองหนึ่งที่
- kor foi thong neung thi
- One foi thong, please
- หวานมาก
- wan mak
- Very sweet
What people get wrong
Treating it as a plate-sized dessert. A small handful of threads is already a full sweet portion, and first-timers who eat it like a regular dessert often find it overwhelming.
Where to Try It
Traditional dessert shops and royal Thai cuisine restaurants; common at Thai weddings.
Tips
- Foi Thong is extremely sweet — it is meant to be eaten in small quantities as an accompaniment to Khanom Buang or other mild pastries.