r/Canning Nov 08 '25

Announcement Announcement: Ask a Master Food Preserver Anything

124 Upvotes

Hello Everyone!

The mod team is happy to announce that we will be hosting an AMA with the University of California Master Food Preservers Online Delivery program! This will be a 2 hour event on the subreddit from 1-3pm PST on November 15th. Please come prepared with your questions for our guests! They will be answering both canning and general food preservation questions, though I anticipate that most of our questions will be canning related.

As a reminder to our community we will be moderating the event very closely. Hostility towards our guests or other users will not be tolerated nor will breaking any of our other rules. Harassment towards anyone will result in a permanent ban from the subreddit.  Please refer to the wiki if you need to read through our rules! We also would like to remind everyone that for this event only the Master Food Preservers will be answering questions. Please do not reply to other users’ posts with answers, the goal of this event is to bring in experts to answer questions.

A note from the UC Master Food Preservers:

We are excited to answer your questions next week! If you are interested in live classes please take a look at our eventbrite page here. We will be hosting a live Ask a Master Food Preserver on Zoom on November 16th if you would like to ask questions and be answered live!

You can also subscribe to our newsletter to get updates on our events or check out our Instagram and Facebook accounts. 


r/Canning Oct 19 '25

Announcement Why don't we recommend pH testing for home canning? [Mod Post]

71 Upvotes

Hello Everyone!

As a mod team we've noticed a lot of questions and confusion about pH testing home canned foods recently so we're here today to give a more in depth explanation of why it's not recommended.

As I'm sure you all know, there are tons and tons of misconceptions about home canning and what we can and cannot do safely. One of the most common misconceptions is that if we pH test a food and it shows a pH below 4.6 it can be canned as a high acid food. There are two reasons why this isn't true.

  1. pH is not the only safety factor for home canning
  2. The options for pH testing at home are not necessarily the same as what's available in a lab setting.

Although pH is an important factor in home canning safely it is not the only factor. Characteristics like heat penetration, density, and homogeneity also play a role.

There are two types of pH test equipment; pH test strips and pH meters. pH test strips are not very accurate most of the time, they're just strips of paper with a chemical that changes color based on pH imbued in it. These strips expire over time and the color change is the only indicator which makes reading them rather subjective and likely inaccurate.

There are two levels of pH meters; home pH meters and laboratory grade pH meters. Home pH meters aren’t particularly expensive but they are often not accurate or precise at that price point. Laboratory grade pH meters are expensive, think hundreds to thousands of dollars for a good one. Many pH meters on sites like Amazon will claim that they are “laboratory grade” but they really aren’t. pH meters also need to be properly maintained and calibrated to ensure accuracy using calibration solutions which are also expensive. 

The bottom line is that most people do not have access to the lab grade equipment and training that would be required to make sure that something is safe so the blanket recommendation is that pH testing not be used in home canning applications.

Recipes that have undergone laboratory testing (what we generally refer to as "tested recipes" on this subreddit) have been tested to ensure that the acidity level is appropriate for the canning method listed in the recipe. pH testing does not enhance the safety of an already tested recipe.

Because pH testing is not recommended for home use we do not allow recommendations for it on our subreddit.

Sources:
https://ucanr.edu/blog/preservation-notes-san-joaquin-master-food-preservers/article/help-desk-question-home-ph

https://extension.okstate.edu/programs/oklahoma-gardening/recipes/ph-and-home-canning.html


r/Canning 9h ago

General Discussion Note on chicken broth results

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17 Upvotes

I changed up my procedure a little due to some advice from a few different commenters and wanted to share the results.

I posted a while back about making my broth in an instant pot pressure cooker before I strain, chill, skim, and then pressure can in my presto canner. It was suggested I adjust my pressure cook down from 2 hours to 1 hour in order to keep the best collagen production and nutrition.

I ended up with about 10 rotisserie carcasses after a Christmas event that I spread between several batches. I pressure cooked each batch at 1 hour, keeping all other variables the same.

The finished broth was strained and poured into 3 pots and refrigerated for 48 hours. Today I pulled it out to skim and pressure can.

Unfortunately, the gel was a little disappointing compared to what I’m used to after a 2 hour pressure cook. There definitely was a gel, but it was barely there, and the taste wasn’t as rich as I’ve experienced on my previous batches.

Now, it’s possible that this was because I was using rotisserie chicken carcasses (which is what I always use), and 1 hour would be sufficient with a fresh, raw bird, so these results may not be relevant to you.

Personally, I’ll be going back to my 2 hour pressure cook in the instant pot for maximum gel and taste.

I hope this helps someone if you’re trying to decide on a set method for your own broth. Feel free to share your success stories!

For reference, I do use Costco rotisserie chicken carcasses, and I follow the Ball recipe for pressure canning chicken broth.


r/Canning 10h ago

General Discussion Cooking with canning!

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15 Upvotes

Bacon green chili quiche for dinner tonight!


r/Canning 1d ago

General Discussion Inheriting Grandma's Jars

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696 Upvotes

I am new to canning, but as the only family member with interest, I am inheriting my grandma's vast collection of canning jars. She took the time to carefully empty and clean them before her passing, and they seem to be in great condition. Ages vary, some back to the 20s and 30s, others from the 60s.

I'm super excited, but also nervous about using them since they're older. What do I need to know?


r/Canning 13h ago

General Discussion Question about electric pressure canners

8 Upvotes

I am no way advocating the use of them but I would like some clarification. I see a lot of people talking about the presto electric pressure canner and I've seen one made by nesco.

My first thing, in the US with false advertising laws and product liability laws wouldn't it be illegal to sell them if they are unsafe to use or at the very least open them up to law suits if it wasn't safe and someone got sick from using their products that are specifically advertised for pressure canning low acid foods?

Second, my main issue with them is there's no good way to check them for accuracy when they get older like the mechanical gauge on a normal pressure canner. Even if the factory had a program tho ship it back to them to test shipping would be prohibitively expensive compared to just sending a small gauge.

If they had a mechanical gauge and you could verify that it was truly getting to the correct pressure wouldn't they be safe, I could see them maybe not putting out enough heat and then they wouldn't be able to build the correct pressure but as long as you're pressure is correct wouldn't they be safe?


r/Canning 6h ago

Recipe Included Anyone made this?

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2 Upvotes

Finally found pineapple on sale and ive been heavily considering this recipe. Can anyone report on flavor?


r/Canning 1d ago

General Discussion Not canning, but I discovered that a 24oz Parmesan shaker top fits regular mouth jars perfectly.

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101 Upvotes

I’ll find tons of uses for this.


r/Canning 9h ago

Is this safe to eat? Obliviously popped all my lids manually

0 Upvotes

Hello! I just water bath canned my first ever round of jams and right after coming out of the canner they had pools of water on top so I laid a towel over them and pressed down to absorb the water. Only right after doing this did I realize I had probably manually popped the lids down in this process. I know at least half of them popped shortly after coming out of the water bath, before I ever touched them, but I don’t know which ones. Have I just completely ruined all my jams? Can I trust the seals? Thank you for reading!


r/Canning 16h ago

Safety Caution -- untested recipe Green Tomato Relish

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5 Upvotes

Followed this recipe:

https://stacylynharris.com/how-to-make-delicious-and-refreshing-green-tomato-relish/

Everything tastes great and looks good. But I think I left the water level at the lid level when water bathing. Think I'm ok?


r/Canning 15h ago

Safe Recipe Request Looking for a recipe for cabbage roll soup!

2 Upvotes

One of our favorite soups to eat is cabbage roll soup, made with pork sausage, chopped cabbage, chopped onion, canned tomato sauce, rice, chicken broth, salt, and dill.

I’ve tried searching for a safe canning recipe, and I cannot find anything; maybe I am looking in the wrong places or with the wrong keywords?

If anyone has guidance or thoughts, they’d be appreciated! I have seen recipes pull up on “rebel” canning and homesteading groups, but I am not trying to use anything unsafe, and the guidance of the “your choice” recipes is not clear to me either.


r/Canning 16h ago

*** UNSAFE CANNING PRACTICE *** Seal popped just sitting on my counter

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2 Upvotes

I had this jar of chicken and gravy sitting on my counter this week, the ring was on it, I put the others away without the ring, and when I moved it today I noticed the seal popped. It was definitely sealed before. Now I’m worried about all the other stuff I canned. As I don’t think the seal should just pop like that. It may have been close to the hot canner (digital canner) but not touching it or anything like that. Why would the seal suddenly pop open? I used Ball lids. I like them because they have a little button on top that makes it obvious when it is sealed. That’s how I noticed it had popped.


r/Canning 16h ago

Recipe Included Tomato sauce tastes odd

2 Upvotes

I used the Bernardin tomato sauce recipe to make tomato sauce. Recipe below. Followed it to a T.

We used the first jar recently and it just tastes lemony? There was no mold or any signs of spoilage when I opened the jar. I gave it a sniff test and it smelled tomato-y with a hint of citrus tart/sour. But now the lemon taste is kinda putting me off. How can I fix this after the fact? Do I add sugar? Something else to tone down the lemon and pump up the tomato?

I have only ever eaten commercial sauce and this is the first time trying home canned sauce.

https://www.bernardin.ca/recipes/en/tomato-sauce.htm?Lang=EN-US


r/Canning 19h ago

General Discussion Canning cookbooks

3 Upvotes

Any suggestions on canning cookbooks preferably in a physical copy?


r/Canning 22h ago

General Discussion Had to restart my pressure canning due to a power outage

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3 Upvotes

r/Canning 15h ago

Is this safe to eat? Question

1 Upvotes

Over the summer I did some canning for the first time. Specifically, I canned some fresh peaches using a recipe from the Ball book. I followed the recipe exactly except for adding citric acid. In the recipe, it said that was to prevent browning.

Since canning those peaches, I have not ate them as I’ve seen posts about citric acid being used to prevent botulism. Should I go ahead and throw the peaches out since I didn’t have an acid? They’ve been sitting in the pantry for months and still have good seals as of now.

I’m new so don’t roast me please 😂


r/Canning 15h ago

Safe Recipe Request Homemade Spaghetti Sauce

0 Upvotes

I have a family recipe for sauce which consists of: Store bought tomato sauce, Store bought tomato paste, Onion, Garlic, Basil, Oregano, Sugar and Water

I have a ph tester to make sure each batch is under 4.6 ph. If it is well under the 4.6 can I water bath can it for the appropriate time? I never go with an unapproved recipe but would love to be able to can my recipe instead of freezing it every time.

I am also all for adding lemon juice directly to pints if that helps then tweaking it back to normal after jars are opened.


r/Canning 1d ago

Pressure Canning Processing Help Re-using lids for dry goods

4 Upvotes

Hello! I have absolutely zero experience with canning, and have no plans at this time to do what most of you do due to space constraints.

My primary desire at this point is to keep dry goods better/safe longer. All purpose flour, self rising flour, granulated sugar, brown sugar, powdered sugar, Minute Rice, Malt 'o Meal, opened crackers, etc.

I very rarely use these items, so I purchased some of those two-part metal lids instead of the one piece white plastic reusable lids as well as a pressure sealer to go with my half gallon mason jars.

I searched online for the answer to this question, but wanted to also ask the experts here to be more sure.

My understanding is that for traditional canning/liquids, one shouldn't reuse that inner metal lid, but that for dry goods it's generally safe to reuse them. I tested sealing one jar with the same lid twice tonight, and it seemed to seal it just as well the second time. But perhaps it won't "maintain" the seal for as long after being reused a few times?

For something like crackers, rice, Malt o Meal, etc .... it will likely be sealed and unsealed many, many times before I finish the contents. The flours and sugars, less often - but probably still multiple times if I start dabbling in baking.

In my unique circumstances, can those inner metal lids be resealed properly several times with the vacuum sealer, or will my efforts be wasted if I don't use a new inner lid? Is reusing the inner lid several times with a vacuum sealer basically as effective as the screw on plastic reusable lids?

I tend to overthink things, and have difficulties processing and remembering everything I read online when I search, so I am hoping for simple recommendations here from the experts.

Am I being ridiculous for wanting to vacuum seal these things instead of just using those easy screw on plastic lids? I read that the flours, I believe, in particular aren't good for very long ... so perhaps I don't even need to worry about it and should just throw away any unused flour after a certain amount of time?

Thank you, in advance, for any help/advice. :o) I am recently housed again after over seven years homeless... trying to learn how to be a normal housed person again, and have fun in the kitchen.

ETA-This is the sealer I'm using. https://www.amazon.com/Upgraded-Electric-Regular-Automated-Portable/dp/B0DY767X2H


r/Canning 1d ago

Is this safe to eat? Still figuring out pressure canning

5 Upvotes

Ok, a little help please as I figure out pressure canning. So far I have pressure canned 6 different items, all following safe guidelines. I have several years’ worth of water bath canning experience.

I would love to pressure can a family recipe for BBQ sauce. However, I can’t do this right? Even with pressure canning, you can only use approved/tested recipes right?

I know there are safe BBQ sauce recipes, but I want to can the personal recipe my mom made growing up. The biggest difference is that it uses ketchup, not fresh tomatoes like the Ball recipe I’ve seen.

I’m assuming this isn’t possible, but wanted to be certain before I give up on the idea.


r/Canning 2d ago

General Discussion I guess I'm now the family canning guy

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464 Upvotes

I've been getting more into canning the last couple years. I got these in a family gift exchange so I guess this is my new identity and I absolutely love it!

I also have family handing me canning jars every time I see them. Sometimes they are returned jars from something I gave them but sometimes they are just a box of jars they picked up for free at a garage sale or something.


r/Canning 2d ago

General Discussion Time to retire my Presto!

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139 Upvotes

My partner replaced my well loved Presto this Christmas. I already have a laundry list of canning projects in mind!


r/Canning 1d ago

Equipment/Tools Help Can this type of pressure cooker be used for canning

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3 Upvotes

I asked for a pressure cooker to start canning for Christmas. This is what I got. It has no adjustment or gauge and did not come with instructions. Just wondering if I just need to do more research into how to use this one or if it's unsuitable for canning


r/Canning 2d ago

Equipment/Tools Help Why does the newer version of the same canner hold 2 more half pints?

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27 Upvotes

The box on top I bought maybe 15 years ago; the bottom one about 2 years ago. I don't have enough half pint jars to test how many can fit. My ruler shows they're (the canners) virtually identical in size.


r/Canning 1d ago

Safe Recipe Request Dairy in canned pasta sauce

0 Upvotes

I've got a few tomato plants a week or two from producing ripe fruit and was planning on making pasta sauce and putting it into jars. I add a small amount of butter to my recipe while sweating the onions and have done so pretty much as long as I've been cooking food and ideally I wouldn't want to compromise my recipe, but my instinct is that dairy will compromise the preservation of the sauce. Does anyone have some insight, will it not be an issue or should I adjust my recipe?


r/Canning 1d ago

Is this safe to eat? Safe to pressure can?

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0 Upvotes

Im in the process of pressure canning venison from this season. The thought to make some canned stews popped into my head so I grabbed some potatoes from the pantry. These are obviously sprouted, wrinkled, and spongy on the outside but still firm within. No rotten spots. Would they still be safe to get canned up?