Central Thai cuisine of the flat and wet central rice-growing plains, site of the former Thai kingdoms of Sukhothai and Ayutthaya, and the Dvaravati culture of the Mon people from before the arrival of Tai groups in the area.
Isan or northeastern Thai cuisine of the more arid Khorat Plateau, similar in culture to Laos and also influenced by Khmer cuisine to its south, as evidenced by the temple ruins from the time of the Khmer Empire.
Northern Thai cuisine of the verdant valleys and cool, forested mountains of the Thai highlands, once ruled by the former Lanna Kingdom and home to the majority of the ethnic groups of Thailand.
Southern Thai cuisine of the Kra Isthmus which is bordered on two sides by tropical seas, with its many islands and including the ethnic Malay, former Sultanate of Pattani in the deep south.
Thai food was traditionally eaten with the right hand while seated on mats or carpets on the floor, customs still found in the more traditional households. Today, however, most Thais eat with a fork and spoon. Tables and chairs were introduced as part of a broader Westernization drive during the reign of King Mongkut, Rama IV. The fork and spoon were introduced by King Chulalongkorn after his return from a tour of Europe in 1897 CE.
Important to Thai dining is the practice of khluk, mixing the flavors and textures of different dishes with the rice from one's plate. The food is pushed by the fork, held in the left hand, into the spoon held in the right hand, which is then brought to the mouth.A traditional ceramic spoon is sometimes used for soup, and knives are not generally used at the table. It is common practice for both the Thais and the hill tribe peoples who live in Lanna and Isan to use sticky rice as an edible implement by shaping it into small, and sometimes flattened, balls by hand (and only the right hand by custom) which are then dipped into side dishes and eaten.
Chopsticks were foreign utensils to most ethnic groups in Thailand with the exception of the Thai Chinese, and a few other cultures such as the Akha people, who are recent arrivals from Yunnan Province, China. Traditionally, the majority of ethnic Thai people ate with their hands like the people of India. Chopsticks are mainly used in Thailand for eating Chinese-style noodle soups, or at Chinese, Japanese, or Korean restaurants. Stir fried noodle dishes such as pad Thai, and curry-noodle dishes such as khanom chin nam ngiao, are also eaten with a fork and spoon in the Thai fashion.
Thai meals typically consist of rice (khao in Thai) with many complementary dishes shared by all. The dishes are all served at the same time, including the soups, and it is also customary to provide more dishes than there are guests at a table. A Thai family meal would normally consist of rice with several dishes which should form a harmonious contrast of flavors and textures as well as preparation methods. Traditionally, a meal would have at least five elements: a dip or relish for raw or cooked vegetables (khrueang chim) is the most crucial component of any Thai meal.Khrueang chim, considered a building block of Thai food by Chef McDang, may come in the form of a spicy chili sauce or relish called nam phrik (made of raw or cooked chilies and other ingredients, which are then mashed together), or a type of dip enriched with coconut milk called lon. The other elements would include a clear soup (perhaps a spicy tom yam or a mellow tom chuet), a curry or stew (essentially any dish identified with the kaeng prefix), a deep-fried dish and a stir fried dish of meat, fish, seafood, or vegetables.