The safest and most effective way to consume psilocybe semilanceata, also known as the “liberty cap” mushroom, is to dry and grind them into a powder and then ingest the powder. This is preferable to eating the mushrooms raw, as this could lead to an upset stomach. You can also make a tea from the dried mushrooms, although this method is not as effective as ingesting the powder. When consuming psilocybe semilanceata, it is important to remember to take the appropriate dosage and be aware of any potential side effects.