Unfortunately, no. Mushrooms are one of the few ingredients that have no alternative. If you're allergic, you'll just have to skip recipes with mushrooms or omit them where possible.
Lindsay S. Nixon
Hi I'm Lindsay also known as the Happy Herbivore. I've dedicated myself helping folks lose weight on a vegan diet. I been blogging since 2006, written 6 books, and started a business called Meal Mentor.