Onion taste in hoppy beers

[Clarence]

I remember reading in one of Randy Mosher's (I think) books about some of his beers tasting of onions. I think he puts it down to lack of nutrients or even trub in the beer. I must confess I raised an eyebrow at this one. Mosher is one of favourite writers, but he does get some funny things happening sometimes.

 

[NIGHTSKY BREWING]

I've found wild hops and the initial smell when rubbed between my fingers is of garlic. Some suggest that overripe hops is the source.

Any dedicated home brewer should have a gas chromatograph amongst his equipment.
https://link.springer.com/content/pdf/10.1007/BF02908410.pdf

This is great reading....is there more papers from 1988.....
So it looks like its from a few paths..... Some as knowledgeably brewers we don't do.

Dimethyl Trisulphide DMTS is purged during fermentation by co2. Its what google said....☺

 

[London]

Once you can taste onions that Charlotte.