| 摘要 |
A method of treating green coffee beans is provided that can prevent contamination by acetic-acid producing bacteria when implementing a fermentation treatment on green coffee beans using microorganisms and that can impart new and favorable flavor and aroma to a coffee drink. This object can be achieved by a method of treating green coffee beans comprising a fermenting step for performing fermentation by bringing a nutritive substance and a fermenting microorganism into contact with one another and then supplying the fermented components thus formed to green-coffee beans, wherein, in the fermenting step, the nutritive substance and the fermenting microorganism are brought into contact with one another in a pH range for inhibiting the growth of acetic-acid producing microorganisms.
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