Mandu arrived in Korea from Central Asian dumpling traditions via the Mongol connections of the Goryeo period (13th century); the name derives from the Mongolian 'buuz'; Korean mandu has evolved distinct regional styles across seven centuries
Mandu-guk (만두국) is Korean dumpling soup — mandu (만두, filled dumplings) in a clear beef or anchovy broth, typically eaten on Lunar New Year. The shape of the mandu carries regional and cultural significance: the half-moon (반달 mandu) symbolises completeness; the pleated crescent (조각 mandu) signals northern Korean tradition; the round-purse style (둥근 mandu) of Gyeonggi province is the most common in Seoul. The filling — pork and tofu with kimchi and garlic chives or the plainer Kaesong style with pork and tofu only — determines the regional identity as strongly as the fold.
Mandu-guk for New Year is a ritual performance as much as a meal — the clear broth represents a fresh start; the dumpling represents wholeness and abundance. The shapes and the care in folding communicate the maker's respect for the occasion.
{"Mandu wrapper: thin (1.5mm), round, and lightly floured — too thick produces gummy wrappers that overwhelm the filling; too thin tears during folding and sealing","Filling moisture control: squeeze tofu dry (press under weight 15 minutes), squeeze kimchi dry, salt and drain cabbage — excess moisture in the filling creates steam pockets that rupture the wrapper during cooking","Pleat sealing technique: press and fold the edge in a series of 6–8 pleats to create a firm seal — simple fold-and-press without pleating comes unsealed in boiling broth","Boil mandu in salted water separately before adding to clear broth — cooking directly in the final serving broth releases excessive starch and filling oils that cloud the broth"}
The Kaesong (개성) style mandu from the North Korean tradition (now primarily practiced by displaced families in Seoul) is the most refined: small, tightly pleated, with a pork and tofu filling without kimchi — the pale filling colour and tight pleats visible through the thin wrapper are quality markers. Gyeonggi-style mandu with kimchi filling is more robustly flavoured and the most common commercial style.
{"Wet filling — the single most common cause of burst mandu; moisture management of every filling component is the prerequisite step","Oversized filling — too much filling cannot be sealed without pleating the edges so tightly the wrapper tears; fill to 60% capacity of the wrapper"}