Manju

The basic form is a wrapper — of wheat flour, rice flour, or grated mountain yam — folded around sweet filling. The blend of the wrapper dough and the choice of steaming versus baking is enough to turn the same idea into a fluffy steamed bun or a fragrant baked one. Fermented with sake lees, leavened with koji, steamed in a hot-spring's vapor, or bound with grated yam — the wrapper is said to have branched into countless local forms depending on what went into it. The ratio of wrapper thickness to filling volume differs from shop to shop, said to change the impression of the same manju considerably.

The wrapper dough is kneaded around the filling, then either steamed or baked on a griddle or in an oven. Steamed versions often have sake lees or koji worked into the dough, which is said to give them their rise and a faint tang. Baked versions more often carry egg or brown sugar in the dough, browned on the surface for a toasted aroma. Judging the steamer's heat and timing relies heavily on a maker's experience, and is said to be adjusted by season and temperature.

One account holds that the Chinese dumpling this dish descends from was originally filled with meat, and that it was reworked with red bean paste in place of meat to suit the dietary rules of Buddhist monks — becoming the prototype of the Japanese manju. Lines built on sake-lees dough, or on the steam of a particular hot spring, are said to have branched off according to each region's fermenting know-how and local resources. That manju is still commonly handed out as a return gift at celebrations and memorial services is said to be no coincidence, given this religious origin.