A method for preparing Kava root involves a multi-stage grinding process to give a resulting very small particle size. Because Kava root is fibrous, and tends to catch fire when ground extremely small, an ambient nitrogen atmosphere is provided during one or more stages of the grinding process to prevent combustion. The resultant very finely ground Kava powder is preferably mixed with other materials, such as ascorbic acid and other food-grade acids, to remove the objectionable taste.