Yeast extract and method of producng the same

A method for producing yeast extract comprising disodium inosinate and disodium guanylate, the method comprising the steps of:

• a) preparing a yeast cream from yeast comprising 8 wt. % or more of RNA, said yeast being a bread yeast, a fermented beer yeast, a torula, or a mixture thereof;
• b) inactivating said yeast in said yeast cream under a temperature of between 40 and 95° C.;
• c) centrifugating said yeast cream and collecting a supernatant;
• d) adding a protease, a nuclease, and a transaminase to said supernatant and allowing to react for 12-25 hrs at 35-80° C. with a pH value of 4.0-6.8;
• e) treating said supernatant at a temperature of 75-90° C. for 50-70 min so as to inactivate the enzymes;
• and
• f) concentrating said supernatant to comprise 35-40 wt. % of a dry matter and spray drying said dry matter to yield yeast extract comprising 4-30 wt. % of disodium inosinate and disodium guanylate.