Thai food is not one cuisine but four, one per region, built around whatever rice, herbs and protein are local. What you eat in a Chiang Mai noodle shop and what lands on a table in a Bangkok curry house share a pantry — chilli, lime, fish sauce, galangal — but almost nothing else about the dish.
Four regions, four cuisines
Central Thailand, home to Bangkok, is where the dishes most familiar outside the country come from: pad thai, the coconut-based green and red curries, and tom yum goong, the hot-and-sour prawn soup built on lemongrass, galangal and kaffir lime, according to the Tourism Authority of Thailand’s regional food guide. Jasmine rice is the staple here, and coconut milk softens much of the chilli heat.
The north cooks differently again. Khao soi — egg noodles in a curried coconut broth with braised meat and a handful of crispy noodles on top — is a Chiang Mai staple with Burmese roots, alongside sai oua, a grilled pork sausage packed with lemongrass and kaffir lime, and gaeng hang lay, a coconut-free pork curry, per the same TAT guide. Sticky rice, not jasmine, is the usual side.
The north-east (Isan) is the sharpest of the four in flavour: som tam, a green papaya salad with chilli, garlic, dried shrimp and peanuts; larb, minced meat tossed with lime, herbs and toasted rice powder; and gai yang, charcoal-grilled chicken, all lean on fermented fish sauce and fresh lime rather than coconut milk, TAT notes. It shares more with Lao cooking than with Bangkok’s.
The south turns toward the sea and toward its Malaysian and Indian-influenced neighbours: massaman curry — beef or chicken with potatoes and peanuts in a warmly spiced, only mildly hot sauce — gaeng som, a sour turmeric-based fish broth, and moo hong, pork belly braised in soy sauce and garlic, according to the TAT guide.
Tom yum goong’s official recognition
Tom yum goong is more than a menu regular. In December 2024, UNESCO’s Intergovernmental Committee inscribed it on the Representative List of the Intangible Cultural Heritage of Humanity, describing it as the “culinary wisdom of riverside communities in the Central Plains of Thailand” and noting that the recipe is passed down orally within families rather than written. That inscription is a statement about the dish’s cultural weight, not a claim that one version is more authentic than another — every region and every household seasons it differently.
Street food, and one dish worth knowing about
Bangkok’s street food is dense enough that a single stall can outdraw a restaurant. The best-known example is Jay Fai, a shophouse stall in the old town whose owner has cooked at a single charcoal station for decades; in December 2017, the inaugural Michelin Guide Bangkok awarded it one star, the only street vendor in that first edition to receive one. Her signature crab-meat omelette runs upwards of 1,000 baht — expensive for street food, ordinary for a Michelin-starred dish — and there is no reservation system, only a queue.
Drinks
Thai iced tea (cha yen) — strong black tea, condensed milk and sugar over ice — and Thai iced coffee (oliang) are the standard non-alcoholic options at food stalls and restaurants alike. On the alcoholic side, Singha and Chang are the two domestic lagers most often on offer, both light enough to sit alongside chilli-heavy food rather than compete with it.
Practical tips
- Spice levels are set by the cook, not a menu scale. If you cannot judge how hot something will be, ask for “phet nit noi” (a little spicy) before you order.
- Dishes are usually ordered to share across the table rather than one each; a meal for two or more people typically means several plates in the middle, not a starter-and-main structure.
- Street food turns over fast, which is generally a sign of freshness rather than a risk — a stall with an empty pot at lunchtime and a queue is a better bet than one with food sitting untouched.
- Fish sauce, shrimp paste and dried shrimp appear across all four regional cuisines; tell the kitchen in advance if you need a dish without them.
What to check before you go
- Whether a dish is described as central, northern, Isan or southern before you order — the same name can mean a noticeably different dish depending on the region you are in.
- Current opening hours and queue times for well-known stalls such as Jay Fai, which change season to season and are not fixed by any official source.
- Your own tolerance for chilli against the region you are visiting — Isan and southern dishes are typically hotter than central Thai versions of the same dish.