PROBLEM TO BE SOLVED: To provide a processed chestnut generally called an extra-soft chestnut or extra-soft sweet stewed chestnut (hereinafter called "extra-soft processed chestnut"), and a method for producing the same.SOLUTION: The method for producing the extra-soft processed chestnut includes the following steps: (1) a step for temporarily depressurizing flavored processed chestnuts as raw material chestnuts containing heated and gelatinized starch directly or while the raw material chestnuts are immersed in a seasoning liquid, moist-heating the raw material chestnuts thereafter while recovering the pressure or increasing the pressure on the raw material chestnuts, and next, recovering the pressure and cooling the chestnuts and (2) a step for sealing/packaging the processed chestnuts obtained in the step (1) and sterilizing the sealed/packaged chestnuts.COPYRIGHT: (C)2012,JPO&INPIT【課題】一般に極軟栗または極軟栗甘露煮と称される加工栗(以下、「極軟加工栗」という。)及びその製造方法を提供する。【解決手段】下記の(1)及び(2)の工程を有する極軟加工栗の製造方法:(1)澱粉が加熱糊化してなる味付け加工栗を原料栗とし、これを一旦減圧した後、復圧または加圧しながら湿熱処理し、次いで、復圧、及び冷却する工程、(2) 上記で得られた加工栗を密閉包装し、殺菌する工程。【選択図】なし