Báicài Xiàn Bǐng (白菜馅饼) is the cabbage-stuffed griddle pie, a flat round of dough sealed around a filling of napa cabbage and cooked on a dry or lightly oiled pan until both faces blister and brown. The angle is moisture management. Napa cabbage is mostly water, so the whole craft of this xiàn bǐng is getting a juicy, sweet vegetable filling to stay inside a thin skin that has to crisp without going soggy or splitting at the seam. Get it right and you bite through a crackling shell into a hot, almost soupy pocket of greens; get it wrong and you get a pale, doughy disc leaking grey water.
The build is a wrapped pie, not a folded one. Soft wheat dough is rested until it stretches, then divided and flattened into rounds. The cabbage is shredded fine, salted to pull out water, then wrung hard in a cloth so the filling goes in damp but not wet, usually bound with a little oil, scallion, ginger, and sometimes a small amount of pork, egg, or dried shrimp for savor. A portion of filling sits in the center, the dough is gathered up and pinched closed, then the sealed ball is pressed gently flat so it cooks evenly. It goes onto a hot griddle seam-side down first to set the closure, then it is turned until both sides carry brown spots and the skin firms. Good execution shows a thin skin that shatters slightly at the edge, a filling that is sweet and still has bite from the cabbage, and a base that is browned rather than scorched. Sloppy work shows itself fast: filling that was never drained turns the inside to a watery slurry and steams the dough soft from within, an overstuffed pie bursts on the pan and welds to it, and too much flour on the bench leaves the finished skin chalky.
It shifts mostly by what joins the cabbage and how the dough is handled. Pork-and-cabbage is the common savory version, the meat juices reinforcing the filling; an all-vegetable build leans on more ginger and oil to carry it; some cooks add glass noodles or egg to firm the texture. The same pinched-and-griddled method spans a whole family of stuffed flatbreads with chive, fennel, or beef-and-onion fillings, and those are their own preparations rather than crowded in here. A leavened, thicker-walled relative is the stuffed xiàn bǐng made closer to a bun, while the pan-fried filled pocket here keeps its identity by being thin-skinned, flattened, and browned hard on a dry surface.