According to top ciderests, cider can in fact be aged. They can really be kept for years, but cider also gets drier over time. ... Most ciders, if kept over their shelf life limit, will eventually yield cider vinegar—yuck. If your cider has gone bad, you will likely get a strong vinegar taste in your drink.

Is it OK to drink expired cider?

The same goes if your sweet apple cider is expired. Cider may not taste so good after it begins to turn darker, sediment forms, and it starts to froth. ... It will taste more sour like vinegar, but it's by no means harmful. Honestly, the cider just becomes unpleasant-tasting and slightly more alcoholic.

How do you know when cider goes bad?

Apple Cider may not taste as good after it begins to “turn”. It will become darker in color and start to froth. When those things start to occur, it just means the cider is undergoing fermentation. It will taste more sour like vinegar, but it's by no means harmful.