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30 votes

Can a sealed jar be unsafe?

It's completely possible. Sealing by itself doesn't preserve the food, effective processing does, then the seal keeps it from regaining any microbes which could cause spoilage. If your food is sealed ...
GdD's user avatar
  • 76.7k
15 votes
Accepted

Is the stock in my unsealed jar safe?

If you had followed correct procedure and found the unsealed jars in a timely manner, (within 24 hours) you could use or freeze them. You did not, you waited 2 days. It is generally false that "...
Ecnerwal's user avatar
  • 18.1k
15 votes
Accepted

Is the liquid inside the canned chickpeas meant for consumption?

Assuming you meant to ask a food safety question, otherwise this is a duplicate: The liquid in the can with your chickpeas is food safe; otherwise, there would be no way for the beans themselves to be ...
FuzzyChef's user avatar
  • 65.3k
15 votes

Is the liquid inside the canned chickpeas meant for consumption?

It depends on what you’re making whether you want to use it or not. If you’re cooking something that just calls for chickpeas, you probably don’t want to use it. Especially if they tell you to rinse ...
Joe's user avatar
  • 80.9k
13 votes

Can a sealed jar be unsafe?

Yes, it's possible. If the soup is producing gas and smelling bad, then it's bad, even if it hasn't popped the seal yet.
FuzzyChef's user avatar
  • 65.3k
8 votes

Can a sealed jar be unsafe?

You are using a process known as "canning". (That you are using jars rather than cans is mostly immaterial; the purpose and principles of the process are the same.) Canning preserves food by ...
Matthew's user avatar
  • 327
5 votes

Freeze tomato sauce with failed seals instead of reprocessing safe?

All three of the canning books that I have on hand—the 1969 Kerr Home Canning Book, the 1973 Better Homes and Gardens Home Canning Cook Book, and the 1972 Southern Living Canning & Preserving ...
Jerry Stratton's user avatar
4 votes

Durian Jam (Pectin ratio)

I'm aware that this is old. However, the topic (and comments) it got me interested in an academic manner in what compounds might be present and how volatile they are, which led me to this article and ...
bob1's user avatar
  • 15.3k
4 votes

Extending shelf life of canned tomatoes

The expiration date on canned goods is for quality, not safety. You can safely eat canned goods years past the expiration date, but the quality will suffer. Re-canning the tomatoes will not improve ...
Esther's user avatar
  • 2,443
3 votes

How do I can coffee with milk? Basically a canned latte

There is no way you can do this on your own. Home-canning safety regulations explicitly forbid any canning of dairy. That would cover also any sale under cottage-industry licences. If you want to do ...
rumtscho's user avatar
  • 139k
3 votes

What are the food saftey requirements to can beans in glass following the hot-fill-hold regulations (USDA)?

Hot, fill, hold is usually used on acidified foods. That is why you find it being used with pickles. Green beans or any other low acid food would need to be pressure canned. Using the hot, fill, ...
moscafj's user avatar
  • 75.8k
3 votes

Canning question

See below for an excerpt from the USDA Complete Guide to Home Canning, Part 1: Principles of Home Canning, where they say that if the pressure falls below the required pressure, you must raise the ...
MTA's user avatar
  • 131
2 votes

Should I throw away a jar of olives that fizzed and bubbled upon opening?

My family has preserved olives for years. Yes, perfectly good olives fizz. We preserved ours with salt and a small amount of vinegar, then filled the quart jar with water, covered the olives and ...
Angela's user avatar
  • 21
2 votes

What is the minimum processing time for salsas?

Time is not a reliable indicator for for botulism safety. The critical factor is heat penetration which depends on container volume and shape as well as time and temperature. I worked on the ...
Woody's user avatar
  • 658
2 votes

Fresh lime juice vs. bottled for canning tomatoes

Short answer: probably, yes, but if you're worried you should test. Long answer: Canning recipes recommend bottled lime and lemon juice because its acidity is known and predictable, whereas fresh ...
FuzzyChef's user avatar
  • 65.3k
2 votes

What happens when you provide too much headspace when canning?

For a thought experiment: Let's say you could hit the really optimal headspace, for perfect vacuum. In this case, during the cooking phase, the food will expand such that it fills the jar exactly, ...
rumtscho's user avatar
  • 139k
1 vote

What to do with the olive oil from canned sardines?

I'd suggest dropping some oil on a slice of bread. Probably too simple to be called a recipe, it's just a sardine-flavoured version of bread with oil. I'd would prefer to do this with the oil from ...
Pere's user avatar
  • 111
1 vote

Pressure canner error message

Beans will look cooked and jars will seal in an unpressurized boiling water bath, so if you're doing a recipe that requires pressure canning, that does not tell you anything useful about the safety of ...
Ecnerwal's user avatar
  • 18.1k
1 vote

Is the liquid inside the canned chickpeas meant for consumption?

Yes, and it can be very useful, as another answer states. We use chickpea aquafaba to make meringues, and in other recipes as an egg replacer, and it works quite well. Look up recipes for a few ideas! ...
Robb Sadler's user avatar
1 vote

Canning prepared and refrigerated jelly the next day

No, from the point of view of food safety, you can't. "The complete book on small-batch preserving" by Ellie Topp and Margaret Howard has a chapter describing the water bath canning process. ...
rumtscho's user avatar
  • 139k
1 vote

Jars of salsa, do I have to boil the jars if they sealed on their own?

I realize this is an older question, but I am not sure any of the response have addressed this sufficiently. There is a clear difference between hot water canning for high acid products and pressure ...
moscafj's user avatar
  • 75.8k

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