A process for preparing a beanless flavor soymilk or okara or a combination thereof, which compares the stages of containing soybeans with deaerated water under an atmosphere of carbon dioxide for a time and a temperature effective to allow said soybeans to soak and swell; washing said soaked and swollen soybeans with water to remove oligosaccharides and ripening enzymes; grinding said washed soybeans under an at atmosphere of carbon dioxide by bubbling in carbon dioxide in a sublimated state to form a slurry; and filtering the slurry to produce raw okara and soymilk.