Once it reaches a boil, reduce to low heat and simmer gently for 45 minutes to 2 hours, depending on your preferred texture.
For a soft, jelly-like snow fungus, simmer for the full 2 hours or more.
Tip: The longer you simmer, the softer and more gelatinous the snow fungus becomes. If you prefer a bit of crunch, 45 minutes to 1 hour is enough.