Dim sum is a complete culinary system: dozens of small dishes — steamed, fried, baked, and braised — served alongside tea in a tradition called yum cha. The steaming techniques are specific: bamboo steamers stacked in tiers over boiling water, lined with perforated parchment or oiled cloth, each tier containing items with similar cooking times. The wrapper work — har gow (translucent shrimp dumplings with 13+ pleats), siu mai (open-topped pork and shrimp), cheung fun (silky rice noodle rolls) — represents some of the most technically demanding pastry work in any cuisine.
Har gow dough uses wheat starch (not flour) and boiling water, creating a translucent, elastic wrapper. Each dumpling should have a minimum of 13 pleats — this is the traditional standard. Siu mai uses a thin egg-and-flour wrapper, filled with pork and shrimp, left open at the top. Cheung fun batter (rice flour, tapioca starch, water) is steamed in thin sheets on oiled trays, then rolled around filling. Steaming requires vigorous boiling water — steam must be constant and generous. Bamboo steamers absorb excess moisture preventing condensation from dripping onto food. Stack by cooking time: longest on the bottom closest to steam, quickest on top.
For har gow: the boiling water poured into wheat starch gelatinises the starch immediately, creating the elastic translucent dough. Work fast — it stiffens as it cools. Each wrapper should be rolled paper-thin. The 13-pleat standard isn't arbitrary — it creates the scalloped edge that marks a skilled dim sum chef. For char siu bao (BBQ pork buns): the dough includes baking powder and ammonia bicarbonate for the signature fluffy-white, slightly sweet bun that splits open on top during steaming.
Water not at a full rolling boil before placing steamers. Not lining steamers properly — dumplings stick. Overcrowding — steam needs circulation space. Opening the lid to check too often. Har gow wrapper too thick — it should be translucent, almost see-through. Not enough fat in siu mai filling — the pork fat is what keeps it juicy during steaming.