Danny, It's not really a cabbage taste to me. It's a sharp bitter after taste. I always boil with the lid off. I've been brewing for a while so I just assumed ...hell I'll make a quick Irish Red it will be good as I've done many times before, but this time it just turned out bad ...... I can't figure out why?
Flars, don't think I oxidized. I'm very careful when I keg to run the line to the bottom of the keg to minimize contact wit the air. I also prime the kegs with co2 as well and also purge well before cooling. I'm obsessed with sanitizing and have never had an infected batch. I have a great fermentation chamber so that is never an issue.
I'm wondering if I'm just tasting that Willamette ? Not a big fan of that variety. Some hops almost has a petrol aftertaste that SA Hoppy Red is a good example....it's hideous