Answer: No.
Reason: Beer is considered water, since the barley is insignificant compared to the water. Bishul akum does not apply to it.
Source:
- Taz, Yoreh De’ah 114:1.
- Star-K: its list of products that need no hechsher includes domestic, unflavored beer.
Related questions:
- Does beer need a hechsher? Star-K: domestic unflavored beer does not.
- Does plain black or green tea need a hechsher? No.
More from Rabbi Tahan: Q&A: Bishul Akum on Beer
References: Star-K, “Approved Without A Hechsher” list
