Short answer
Yes. Edible mushrooms are halal in all four schools, and the Prophet ﷺ praised truffles, a kind of fungus. Only mushrooms that harm or intoxicate are forbidden: poisonous species, and psilocybin or magic mushrooms.
Edible mushrooms and truffles are halal (mubah). Hallucinogenic mushrooms are haram as intoxicants, and poisonous ones are haram because of the harm.
The four schools agree on this.
Explanation
Mushrooms are neither animals nor plants in the biologist's sense, but in fiqh they are treated like plants: lawful unless they harm or intoxicate. Button, chestnut, portobello, shiitake, oyster and enoki mushrooms, and truffles, are all halal, and the four schools agree.
The Prophet ﷺ said that truffles are from the manna and that their water is a cure for the eyes. Truffles are a kind of fungus, so this hadith shows fungi as a lawful and even praised food.
- Magic mushrooms (psilocybin), whether eaten or brewed as tea: haram, as they alter the mind. Being legal or decriminalised in some places does not change this (see is weed haram).
- Wild foraged mushrooms: halal if edible, but many species are deadly, so do not eat any you cannot identify with certainty.
- Mushroom supplements such as lion's mane or reishi: halal as food; check capsules for gelatin.
- Restaurant mushroom dishes: often cooked in wine, butter with bacon, or meat stock. Ask.
For other ingredients, see the halal food checker.
The evidence
Quran, Surah Al-Baqara 2:168
يَٰٓأَيُّهَا ٱلنَّاسُ كُلُوا۟ مِمَّا فِى ٱلْأَرْضِ حَلَٰلًۭا طَيِّبًۭا وَلَا تَتَّبِعُوا۟ خُطُوَٰتِ ٱلشَّيْطَٰنِ ۚ إِنَّهُۥ لَكُمْ عَدُوٌّۭ مُّبِينٌ ﴿١٦٨﴾
O mankind, eat from whatever is on earth [that is] lawful and good and do not follow the footsteps of Satan. Indeed, he is to you a clear enemy.
What grows from the earth is lawful unless harmful.
Sahih al-Bukhari 4478
Sahih... الكمأة من المن وماؤها شفاء للعين ...
"Truffles are from the manna, and their water is a cure for the eyes."
Praises a kind of fungus as a food.
Where the ruling is recorded
- Radd al-Muhtar (Ibn Abidin), Kitab al-Ashriba. Substances that affect the mind are forbidden in the amount that does so.
- al-Fatawa al-Hindiyya, Kitab al-Karahiyya, chapter on eating. Plants are lawful unless they harm.
Checked by our team. For a more accurate answer to your own situation, consult a scholar. Quran translation by Sahih International. Hadith Arabic from the standard editions of the six books and the Muwatta, with gradings as recorded there; the English is our own rendering. Spotted a mistake? Tell us.