Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [canning]

Questions about food being preserved into glass jars, metal cans, or other air-tight containers using a variety of heat treatment steps to ensure a reasonable level of pasteurisation and/or sterilisation

22
votes
1answer
3k views

What to expect from canned bear meat?

I aquired a can of bear meat from Finland. I'm not sure what to expect of the contents of the can. Will the meat be pre-cooked? I can find some ideas online for preperation of fresh bear meat, but ...
21
votes
1answer
2k views

How prevalent was foodborne botulism before stricter food safety guidelines?

Nowadays, foodborne botulism seems to be quite rare, even from potentially high-risk things like home canned goods. (The CDC Botulism Surveillance reports indicate on the scale of tens of confirmed ...
15
votes
7answers
44k views

Is the double boiling canning procedure really necessary?

It seems the usual procedure is to sanitize cans and lids by immersing them in boiling water, to fill the cans, and then to cap them and boil for a few more minutes. If I sanitize a can and then fill ...
15
votes
5answers
11k views

Why do you need to peel peaches to can them?

I am going to be canning a bunch of peaches tonight, and I know that you have to peel them first (and I know how to do it easy), but I got to wondering, why do I have to do it? I have always done it. ...
15
votes
2answers
6k views

Why peel tomatoes?

Everyone seems to think it is necessary to peel tomatoes before canning or freezing them. Since I do not peel tomatoes when I'm cooking with them (soups, salsa, etc.), I'm wondering if I can freeze ...
13
votes
4answers
9k views

Can I can vegetables using sous-vide?

My girlfriend and I were talking about the summer produce season approaching and hit on the idea of canning sous-vide. That is, rather than sterilizing by high heat for a short amount of time, you ...
13
votes
8answers
16k views

Is there a way to safely can pesto sauce?

I grow basil and I have enough that I would like to can some pesto sauce. I have tried to find a way to can it but I keep hitting a wall. I would like to give a few cans of pesto to people for ...
13
votes
2answers
10k views

How to recover jam that has set too hard?

Every time I make jam I always manage to set it too hard. Is there any way to recover it once it's done this?
12
votes
8answers
44k views

Method of canning without pressure canner?

I'm debating canning but I don't have a pressure canner. I was just wondering what the best method to can would be since I don't want to get botulism and I want the canned food to last for a long time....
11
votes
2answers
2k views

Why does processed meat contain preservatives, while canned fish needs not?

I've read that canned salmon typically does not contain any preservatives. On the other hand processed meat (such as ham) contains them. Why are preservatives needed in some cases but not others?
11
votes
5answers
23k views

Do tinned foods go off (stale)?

This morning I found a tin of baked beans with a best before date of August 2014. A colleague of mine told me that it's perfectly safe to eat, and that tinned foods never go off. Can this be true? Do ...
11
votes
3answers
9k views

Ball Canning Jars: Use them over and over?

A simple question: Can I seal and reseal Ball canning jars over and over? How long before the seal gets busted usually? Also, how do you clean the rubber seal ring without damaging it?
11
votes
3answers
9k views

Will botulism growing in my home-canned vegetables pop the lid?

I remember that in my biology class in high school the teacher told showed us a puffed up can of pineapples which he claimed had botulism in it. Is that remotely true? and if so, can I tell if my ...
11
votes
2answers
3k views

Jar lids popping several times

I've canned my whole life (54 years old), I started when I was young helping my Mom, and I've never run into this before. I've never canned just plain pork stock before, but wanted to try. I had 4 ...
11
votes
2answers
510 views

How can I determine canning processing times?

I know safety is paramount with canning, and best answer is always to find a trusted recipe. But that's obviously not possible for every conceivable food one might want to can. Besides, trusted ...
10
votes
1answer
24k views

Why are my canning lids popped out?

My wife has been trying to can some foods using the canning techniques that she's familiar with from Romania, but with the American-style canning jars and lids that we get here. This involves packing ...
10
votes
4answers
16k views

I wanted to make homemade pickles, does it matter what type of salt I use?

I've got the spices, jars, etc. I was wondering if there is a special salt, or can I just use table salt?
10
votes
4answers
8k views

Why is my blueberry jam grainy?

I recently made and canned blueberry jam for the first time, using this recipe and canning instructions. I filled all my jars & canned them, but there was a little jam left in the pot. It was a ...
10
votes
2answers
834 views

Can I can bacon?

This question is my wife's. Of course, I wouldn't want to save bacon for later. I have seen commercial canned bacon for long term food storage and camping, etc. Is it possible to can bacon at home? ...
10
votes
1answer
209 views

Why do home-made pickles float in the jar, but commercial pickles don't?

I make a lot of home-made pickles; mostly pickled onions/shallots/cucumbers. I use a cold process and I don't pre-brine. I notice all of my pickles always end up floating to the top of the jars, even ...
9
votes
1answer
2k views

Will a dishwasher sterilize bottles for canning?

I'm making tomato relish. Can I sterilize jars adequately by putting them in the dishwasher?
9
votes
3answers
396 views

Pressure canning instructions

Where can safe and reliable instructions (including high and low altitude canning) be found for canning?
8
votes
6answers
27k views

Minimum procedure for sterilizing mason jars for canning

My wife and I are about to do some tomato canning tomorrow. We have a bunch of mason jars that we didn't have time to sterilize. She thinks that just washing them in hot water is enough. After ...
8
votes
5answers
3k views

Are bubbling preserved lemons a sign of spoilage?

I recently made preserved lemons using a recipe from Jerusalem: The Cookbook. Having poked around a variety of recipes online, it's pretty much the same as all the rest: Lots of salt, squeeze out the ...
8
votes
5answers
13k views

New to jam making - do I need to can?

I am a noob-to-be jam maker and a noob seasoned advice member. I want to make this pectin-free jam recipe; but here is the issue: In English speaking sources, any jam recipe goes with instructions on ...
8
votes
2answers
7k views

Do you need a pressure cooker to can home-made salsa?

I grew my own tomatoes this year and had success with making my own salsa. Do you need a pressure cooker to can home-made salsa?
8
votes
1answer
880 views

Does cornstarch affect the pH of what I'm cooking?

I'm considering canning some fruit compotes to use with yogurt, and the recipe I want to use (which was not designed with canning in mind, found here: http://www.simplebites.net/how-to-make-your-own-...
7
votes
6answers
4k views

Plum preserving/storage method that tastes like plums, not prunes (I just picked 30 lbs)

I just did some neighborhood foraging and picked 30 pounds of red plums. They are delicious, but even I will have trouble eating them all this week. Last year we made jam/preserves but it ended up ...
7
votes
1answer
262 views

In industrially produced soup, how does each can contain equal parts of all ingredients?

In the soup that you get at the store, how come you never get cans of just broth? You'd think that if the soup were made in a large vat, the first few cans would have very little broth and the last ...
7
votes
1answer
6k views

How long is SPAM really good for?

I wanted to buy some SPAM for my zombie apocalypse survival kit, and I noticed that it had an expiration date in 2013. Should I be concerned? I've heard it will last more than 25 years.
7
votes
2answers
309 views

How to determine if canning is safe?

How can I tell if it is safe to can a particular homemade sauce? Is it just a function of pH and technique (pressure vs boiling water) or are there any other factors in play? Specifically, I would ...
7
votes
2answers
287 views

The pressure cooker gauge was wrong for cans of soup I processed in the past 5 weeks. What can I do with the soup?

I've been pressure canning zucchini soup the past 2 years and it's a beautiful thing. This year I used a different pressure cooker, and I've just found out that 15psi on this pressure cooker is ...
6
votes
3answers
3k views

Canning with candles

I am not sure about the right terminology as I am not a native speaker, but is it possible to conserve solid food in a jar with a candle? Boiling is used to decrease air and for the food to be well ...
6
votes
1answer
9k views

Does canned tuna contain preservatives?

I want to know how the tuna can be kept for so long in a can. Do they use preservatives? Or is it just tuna and water (or oil or brine)?
6
votes
2answers
400 views

Can pressure canning be replaced water bath canning?

I wanted to make and can, my Grandma's tomato soup. However I don't have a pressure canner. I made the soup in a 15 PSI pressure cooker and then poured it into sterilized jars and then canned it in a ...
6
votes
3answers
39k views

Why would I turn canning jars upside down for 15 minutes after removing from the water bath?

I am planning to can a plum chutney and have ordered the Stagioni 10 1/2 oz jars. Having only used Ball jars, I am not sure I understand why their website says to remove from water and place upside ...
6
votes
3answers
12k views

What can I do if I didn't process my salsa long enough?

I made salsa last week, and processed the jars (quarts) for 20 minutes (may have been 25, I forgot to note exactly when the water started to boil). I got my times mixed up for the salsa and some ...
6
votes
2answers
2k views

Stockpot double as beer brewing pot

I wanted to buy a large stockpot for canning tomato sauce and be able to use the same pot for the double purpose of beer brewing. I'm considering Update International Stainless 40 Qt. stockpot. It has ...
6
votes
1answer
276 views

Canning fresh meat in an oil bath?

I was recently given some home canned fresh pork, that was preserved by boiling at 100C for three hours. It is only a few weeks old and tastes delicious, but after reading up on canning processes, I ...
6
votes
1answer
193 views

What are the guidelines for creating a canning recipe?

I am looking for the criteria that make an acceptable recipe for canning. Most sites say to only use approved canning recipes and not make substitutions, which is totally understandable, but surely ...
5
votes
2answers
5k views

Should I sterilize new canning jars?

They are new. Never opened. Sealed. Do I have to bother sterilizing both lid and bottle by immersing them separately in canner and pan? Or are they safe and sterile considering they are straight from ...
5
votes
3answers
2k views

Is it safe to remove the rings on jars for long-term storage of home-canned goods?

Is it okay to store the canned goods without the ring screwed on it? I know someone who removes the screwed rings off her jars once they're processed and then stores her jars with the seal lids only.
5
votes
3answers
676 views

Does canning stock raise its temperature too high?

I've read that the ideal way to make stock is to: crack the large bones place the carcass in a stock pot cover with water bring it to a simmer (not a boil) on the stove place the whole thing in ...
5
votes
1answer
2k views

Is it normal this white substance in my canned green peas?

I just opened a can of petit pois and I found them covered in this white, gooey substance, as opposed (or maybe better "in addition") to the usual clear liquid. I don't think I have seen it before. I ...
5
votes
4answers
10k views

How to keep pumpkin fresh for a long time?

I want to store some (about 10 kg.s) fresh pumpkin for a long time (3-6 months) to use in pumpkin pies mostly. What's the most useful way of doing it? Can I put them in freezer? Raw or cooked? And ...
5
votes
1answer
628 views

Canned Stewed Tomatoes without lemon juice

I'm making stewed tomatoes & forgot to put the lemon juice in before sealing the jars. Will they still be ok or should i start over?
5
votes
1answer
196 views

Is it ok to include garlic when I can hot peppers?

I followed the Ball Blue Book recipe for canning hot vinegared peppers. I left the peppers whole, and forgot to discard the garlic from the vinegar recipe before I filled the quart size jars & ...
5
votes
1answer
275 views

should my sour pickles be sealed while pickling?

I'm making sour pickles. A lot of recipes say that the lid should be loose or upside down so that the pickles have room to "breath". I keep the jars out, often coming into contact with light from ...
5
votes
1answer
2k views

Can steaming cans of jams be safely used instead of boiling to sterilise?

Can i sterilise my filled jars of marmalade, raspberry and cherry jam in a steamer unit, such as those used to steam vegetables or baby bottles? I usually make batches of 15 jars so its difficult for ...
5
votes
3answers
1k views

How can I keep my jam from overcooking while I process it?

As we've rolled into fruit season this year I've started canning up some jams using a traditional boiling process in my big stock pot (though I'm getting pretty close to investing in a pressure canner ...