Chestnuts are rich in starch, there is a layer of wood outside the shell, and individual chestnuts are not big, in fact, it is relatively easy to cook, pressure cooker to cook chestnuts, generally after 6-10 minutes on the steam after the fire can be turned off (chestnuts should be cooked for a longer period of time), plus the front and back of the heating time and so on the deflating time, it takes about 15-20 minutes.