---
title: "The Mushroom Murders: When Erin Patterson Poisoned Her In-Laws with Beef Wellington"
description: "The gripping true crime story of Erin Patterson, who poisoned her in-laws with death cap mushrooms hidden in beef wellington, leading to three deaths and one of Australia's most shocking criminal trials."
url: https://casualcriminalist.pub/article/the-mushroom-murders-erin-patterson-beef-wellington-poisoning.md
canonical: https://casualcriminalist.pub/article/the-mushroom-murders-erin-patterson-beef-wellington-poisoning
datePublished: 2026-06-16
dateModified: 2026-06-16
author:
  - name: Dana Ortiz
    url: https://casualcriminalist.pub/author/dana-ortiz
publisher: Casual Criminalist
image: "https://media.casualcriminalist.pub/cdn-cgi/image/width=1600,height=900,fit=cover,quality=80,format=auto/articles/c9ihTuoYxsY/hero.jpg"
type: Article
contentHash: 7b42cae4704fd667b096333d4ab7abeeb5b98b2946fa908d58b40f1539d99409
tokens: 51
summaryUrl: https://casualcriminalist.pub/article/the-mushroom-murders-erin-patterson-beef-wellington-poisoning.md.summary.md
---

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The gripping true crime story of Erin Patterson, who poisoned her in-laws with death cap mushrooms hidden in beef wellington, leading to three deaths and one of Australia's most shocking criminal trials.
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