The recipe was found in a notebook of Kaientai (a group created by Ryoma Sakamoto, who is a ronin from Tosa domain).
The recipe was followed strictly and made with the skill of CASTELLA(CASTILLA) making after many trials and errors.
Compared to the current CASTELLA(CASTILLA), it is not as moist but it brings out the scent of eggs and sweetness of the sugar.
The recipe from the time period is in the back of the package so please enjoy that as well.
One 700 yen