2. If it is warm water, 1-2 hours is enough. If it is cold water or hot water, it takes a long time to soak, which may take about ten hours. In addition, adding starch, sugar and other accessories will also speed up the soaking time of mushrooms, so the specific situation needs to be analyzed in detail, and they can be eaten after soaking. It should be noted that the time of soaking mushrooms should not be too long, otherwise some nutrients of mushrooms may be lost.