I opened up a package of ground beef today that I had bought the day before from a reputable grocery store. I left it out about an hour to warm up a little. It was grass-fed, which I don't normally buy but do sometimes. This time I immediately noticed a slightly sweetish smell--possibly like Worcestershire sauce, but hard to place. Not really bad, but slightly stronger than ground beef normally smells. Could it be something in the cow's diet, or have I bought meat that's too old to eat?

  • Update: I'm normally pretty cautious about this stuff (when in doubt, throw it out), but I decided to cook this because it really didn't seem bad. The taste was gamier than normal (a bit like lamb). It was actually pretty good. The smell if anything got stronger as the meat cooked (especially when the fat was initially escaping and hitting the pan).
    – AlexMA
    Oct 24, 2013 at 14:08

1 Answer 1


Grass-fed beef does certainly smell different from corn-fed beef. I haven't noticed it smelling "sweeter", but it could smell gamey, earthy, or even sulfuric if the cow got in to some wild onions or garlic. And there's plenty of variation between different types of grass and even the same grass variety from season to season.

Corn-fed beef is not going to have that because, well, there isn't much variation in animal feed corn.

Rotten meat has a distinctive smell and it's going to be the same smell in grass-fed beef.

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