Jiaozi (饺子) — the boiled or pan-fried dumplings of northern China — are one of the most fundamental preparations of Chinese domestic cooking and one of the most culturally loaded foods in Chinese culture. In northern China, jiaozi are the required food for the Lunar New Year celebration — traditionally eaten at midnight as the New Year turns, with some dumplings containing a coin that brings good fortune to the eater who finds it. The preparation of jiaozi is itself a family ritual: the whole family gathers to mix, roll, and fold — the communal production of hundreds of dumplings over several hours is part of the celebration.
The cold-water dough (leng shui mian, 冷水面): 300g plain flour + 150ml cold water. Knead 10 minutes until smooth and elastic. Rest 30 minutes covered. Cold-water dough is used for jiaozi because the resulting skin has a slightly firm, chewy bite after boiling — distinct from the soft, tender skin of hot-water dough used for Cantonese preparations. Classic fillings: Pork and cabbage (zhu rou bai cai): 200g minced pork, 150g napa cabbage (salted, squeezed, and wrung dry of excess moisture), ginger, scallion, soy sauce, sesame oil, Shaoxing wine. Pork and chive (zhu rou jiu cai): 200g minced pork, 100g Chinese yellow chives (jiu cai), seasoned as above. Chinese chives are a stronger, more aromatic variety — they do not require the salting and drying that cabbage requires. The wrapping: Roll dough into a long rope, cut into pieces (15-20g each). Roll each piece into a round (8cm). Place 1 tbsp filling in the center. Fold in half. Pleat the top edge of the wrapper towards the bottom edge — 5-7 pleats on each side — creating a crescent shape with a thick pleated border. Boiling: Large pot of boiling water. Add jiaozi in batches. When water returns to a boil, add 1/2 cup cold water — repeat 3 times. Serve with Chinkiang vinegar, light soy sauce, and chilli oil.
Insufficient moisture removal from cabbage: Wet cabbage filling saturates the dough wrapper during assembly and storage, causing the jiaozi to become waterlogged and fragile during boiling.
Fuchsia Dunlop, Every Grain of Rice (2012); Eileen Yin-Fei Lo, Mastering the Art of Chinese Cooking (2009)