Traditional dim sum includes various types of steamed buns such as cha siu baau, dumplings and rice noodle rolls (cheong fun), which contain a range of ingredients, including beef, chicken, pork, prawns and vegetarian options. Many dim sum restaurants also offer plates of steamed green vegetables, roasted meats, congee porridge and other soups. Dessert dim sum is also available and many places offer the customary egg tart. Having a meal in a Chinese teahouse or a dim sum restaurant is known as yum cha (yam cha, 飲茶), literally "drinking tea", as tea is typically served with dim sum.
Dim sum can be cooked by steaming and frying, among other methods. The serving sizes are usually small and normally served as three or four pieces in one dish. It is customary to order family style, sharing dishes among all members of the dining party. Because of the small portions, people can try a wide variety of food.
Dim sum dishes can be ordered from a menu or sometimes the food is wheeled around on a trolley by servers. Traditionally, the cost of the meal is calculated based on the number, size, and sometimes color of the dishes left on the patron's table (more below). Some modern dim sum restaurants record the dishes on a bill at the table. Not only is this tidier, it also prevents patrons from cheating by concealing or stealing the plates. Servers in some restaurants use distinct stamps so that sales statistics for each server can be recorded.