
Must-try dessert in Ayutthaya
Foi thong and the golden sweets
Ayutthaya, Phra Nakhon Si Ayutthaya Province
Egg yolk drizzled in fine threads into hot syrup and gathered into golden skeins — with thong yip and thong yot, its pinched and dropped siblings — sold by weight from sweet shops and used at weddings and ordinations.
Taste
Very sweet, dense, entirely egg yolk and syrup
Spice level
Not spicy
Best time to eat
After a meal, in small quantities, or bought as a gift
Price range
฿50–150 by weight
Food type & tags
Best paired with
Masala chai
The dish
What is Foi thong and the golden sweets?
Expect it to be very sweet, dense, entirely egg yolk and syrup, with a not spicy kick.
The story
Why is Foi thong and the golden sweets famous in Ayutthaya?
These are Portuguese. They came into the Siamese royal kitchens in the 1680s with Maria Guyomar de Pinha, a woman of Japanese, Portuguese and Bengali descent born in Ayutthaya's foreign quarter, who adapted the egg-yolk sweets of Iberian convents into what are now Thai ceremonial desserts. Their names all contain thong — gold — and they are given at weddings for that reason. Four hundred years later almost nobody in Thailand thinks of them as foreign.
When to go
Best time to eat it
Foi thong and the golden sweets is best enjoyed at after a meal, in small quantities, or bought as a gift, ideally with a hot cup of masala chai or filter coffee to balance the sweetness. Many spots make fresh batches through the day, so it’s easy to fit into your plan.
Where to eat
Best places to try Foi thong and the golden sweets
Trusted Ayutthaya spots — hours and directions.
Open Daytime, daily
Foi thong and the golden sweets available here
DirectionsOpen Late afternoon into the evening; the wet market runs early morning
DirectionsOpen Morning until the trays are empty, usually early afternoon
DirectionsOpen Lunch and dinner; busiest on Saturday and Sunday lunchtimes with Bangkok families
DirectionsPerfect pairing
What to eat with Foi thong and the golden sweets
Foi thong and the golden sweets pairs best with a hot cup of masala chai or filter coffee to balance the sweetness. It’s a vegetarian dessert, so keep the rest of the plate light and let the dish be the star.
Make a morning of it
Pair it with a photo spot
Eat well, then shoot nearby in Ayutthaya.
Chao Sam Phraya National Museum
Midday, and mostly as a break from the sun rather than for photographs — the gold is behind glass and photography in the treasure room is restricted
Fuel up on Foi thong and the golden sweets, then shoot Chao Sam Phraya National Museum.
See photo spotHua Ro Market
Late afternoon, when the food stalls set up and the light comes in under the awnings from the river side
Fuel up on Foi thong and the golden sweets, then shoot Hua Ro Market.
See photo spot
Wat Chaiwatthanaram
Sunset from the far bank of the river, and then the hour after dark when the whole complex is floodlit — it is the only ruin here that is lit at night and it is the best photograph in the city
Fuel up on Foi thong and the golden sweets, then shoot Wat Chaiwatthanaram.
See photo spotWant something else?
Search Ayutthaya food by craving
Foi thong and the golden sweets in Ayutthaya
On the end of the meal in Ayutthaya, Foi thong and the golden sweets holds its place - very sweet, dense, entirely egg yolk and syrup, vegetarian, and exactly the kind of thing worth crossing town for.
Egg yolk drizzled in fine threads into hot syrup and gathered into golden skeins — with thong yip and thong yot, its pinched and dropped siblings — sold by weight from sweet shops and used at weddings and ordinations
🍛 What it is
Start with the description and hold it in mind: egg yolk drizzled in fine threads into hot syrup and gathered into golden skeins — with thong yip and thong yot, its pinched and dropped siblings — sold by weight from sweet shops and used at weddings and ordinations. It is a vegetarian preparation, which shapes where you find it and when.
The category tells you most of the practical story: a sweet, which in Ayutthaya means a measured serving, portions sized to the moment rather than to a menu photograph.
Locally it is filed under: vegetarian, thailand, dessert - which is the vocabulary to use when asking for it.
📜 Where it comes from
These are Portuguese. They came into the Siamese royal kitchens in the 1680s with Maria Guyomar de Pinha, a woman of Japanese, Portuguese and Bengali descent born in Ayutthaya's foreign quarter, who adapted the egg-yolk sweets of Iberian convents into what are now Thai ceremonial desserts. Their names all contain thong — gold — and they are given at weddings for that reason. Four hundred years later almost nobody in Thailand thinks of them as foreign.
This is food with an address: Foi thong and the golden sweets as Ayutthaya makes it, for the people who have eaten it longest.
👅 The taste, honestly
The register of it is very sweet, dense, entirely egg yolk and syrup - that is the honest one-line tasting note, and it holds from the first bite to the last.
There is no chilli heat in it at all.
The shape of the eating: it is a supporting player by design. Plan the rest of the meal around that.
🕐 When to eat it
Locals eat it after a meal, in small quantities, or bought as a gift - and matching the local clock is half the pleasure of the dish.
Sweets keep their own hours - fresh through the day at good shops, and at their best when the batch is new rather than the tray tired.
🥣 Ordering it well
In Thailand, the stall with the queue is the stall to join - locals eat standing at the good ones, and the line is the entire ranking system.
💰 What it costs
The local range is ฿50–150 by weight in Ayutthaya - within it you are paying the local price; far above it, you are paying for something else.
It is a budget-friendly item - kind to every wallet, and no less authentic for it.
🤝 Eating it like a local
Eat it Thai-style: in the middle of the table, a spoonful at a time among everything else, never as one lone plate.
And the pairing instinct: something bitter or plain alongside - strong tea, black coffee - because that is what the sweet is for.
Questions
Foi thong and the golden sweets — FAQ
What is Foi thong and the golden sweets?
Egg yolk drizzled in fine threads into hot syrup and gathered into golden skeins — with thong yip and thong yot, its pinched and dropped siblings — sold by weight from sweet shops and used at weddings and ordinations.
Is Foi thong and the golden sweets veg or non-veg?
Foi thong and the golden sweets is vegetarian. Spice level: not spicy.
Where can I try the best Foi thong and the golden sweets in Ayutthaya?
Try The roti sai mai stalls. See the "Best places to try it" section above for hours and directions.
What should I eat with Foi thong and the golden sweets?
Pair it with a hot cup of masala chai or filter coffee to balance the sweetness.
When is the best time to eat Foi thong and the golden sweets?
Foi thong and the golden sweets is usually eaten after a meal, in small quantities, or bought as a gift.
