Khao Soi

Khao soi is egg noodles in a rich coconut curry broth, topped with a tangle of the same noodles fried crisp. It is Chiang Mai's signature bowl, and the dish itself traces back to Muslim trade routes that carried curry-spiced noodle soups south from Yunnan and Myanmar into northern Thailand.

What it really is

Fresh egg noodles boil until tender and go straight into a broth built on coconut milk and a curry paste heavier with turmeric and dried spice than the fresh-herb pastes used further south, giving the broth its deep yellow colour and a flavour closer to Burmese or Yunnanese cooking than central Thai food. A handful of the same raw noodles fries separately until crisp and brittle, piled on top just before serving so every bowl carries both a soft and a crunchy texture side by side.

The crispy noodle topping is a defining feature, not decoration. Skipping it turns khao soi into an ordinary curry noodle soup; the contrast between soft, broth-soaked noodles below and crunchy fried ones on top is exactly what the dish is known for.

How it is served

• In a deep bowl, crispy noodles piled high on top.
• With pickled mustard greens, shallots and a wedge of lime on the side.
• As a main course, a full meal rather than a starter.

How to write it on the menu

• Flag the wheat in the noodles and the egg used in making them.
• Say if chicken or beef is used, since both are common in different kitchens.
• Note the dish's northern, trade-route history if guests ask why it tastes different from other Thai curries, since that origin genuinely explains the flavour.