Tom kha kai, tom kha gai, or Thai coconut soup[1][2][3] (Thai: ต้มข่าไก่, pronounced [tôm kʰàː kàj]; lit.

The earliest recorded version of the soup was called tom kha pet, and it featured duck and young galangal in a coconut milk-based curry.

In addition to chicken, shrimp is also a popular protein option and is often referred to as tom kha kung.

However, tom kha is distinguished by the addition of coconut milk, which lends it a creamy texture and a milder, sweeter taste compared to tom yam.

[8] Tom kha kai recipes typically include coconut milk, galangal (sometimes substituted with ginger), kaffir lime leaves, lemongrass, Thai chili, coriander (or dill), straw mushrooms (or shiitake or other mushrooms), chicken, fish sauce, and lime juice.