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藕变黑怎样让它变白
更新时间: 2020-10-19 00:00:00  

将变黑的莲藕在水中倒入几滴白醋,略微浸泡几分钟后即可变回原来色泽。

藕变黑原因为组织中含黄酮素与多酚氧化酶这两种物质,与空气接触会被氧化成黑色。为防止藕发生变色,可将其泡在淡盐水中,在水中滴入几滴醋防止它氧化。用藕炒菜的技巧为,切成片,浸泡在清水中,一方面洗去其中的粘性物质,另一方面,防止其变色,炒出色泽不好。炒藕片时越炒越粘,可边炒边加少许清水,不但好炒,而且炒出来的藕片又白又嫩,煮藕时忌用铁器,会使藕发黑。

关键词: 怎样

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