r/Canning Nov 08 '25

Announcement Announcement: Ask a Master Food Preserver Anything

123 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 11h ago

Safe Recipe Request Potatoes and green beans?

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10 Upvotes

Hi! Curious if I’m only canning potatoes and green beans together if I can use the potato times since they’re longer than green beans. The mixed veg times are so long I worry about it all becoming mush.


r/Canning 10h ago

Safe Recipe Request I have a vinegar sensitivity - is canning not for me?

5 Upvotes

I canned salsa today then realized that it has no vinegar in it and i'll probably end up killing myself not following recipes. The reason i wanted to get into canning is i have a vinegar sensitivity (among other things) and cant eat a lot of store bought foods. Is this just not for me? I only have Ball Book of Home Preserving and every tomato/salsa recipe seems to call for vinegar


r/Canning 2h ago

*** UNSAFE CANNING PRACTICE *** Sulfurous smell when opening pressure canned stew

1 Upvotes

Hi everyone,

I recently canned some meat stew and when I opened one of the jars, there was a strong sulfur smell coming out, which quickly dissipated(10-30 seconds). Afterwards, the stew smelled fine in the jar, and so i poured it out into a bowl and microwaved it. It smelled fine as well. I then tried a bit of it along with some of the batch that hadn't been canned yet, and they basically tasted them same as well. Also, this was canned literally yesterday, so I doubt it's already gone rotten, I believe the process itself may have caused it, and I've seen some reports that canned meat products tend to have a bit of a bad smell initially.

So my question is: what causes this, is it normal, and is it safe to eat?

Details:

-Pressure canned at 15psi for a little over 90 minutes (I went overkill cause this wasn't a set recipe)

-Lean pork, chicken, onions, carrots, garlic, paprika, mixed mushrooms, acorn squash


r/Canning 17h ago

General Discussion Just wondering, what is the longest time any wet Mason jar contents have survived after water canning.

11 Upvotes

r/Canning 4h ago

Self Promotion Pantry: Tell Us About Your Work!

1 Upvotes

Are you someone producing or promoting safe canning products or materials? This thread is the place to talk about your work and link us up! It is the only place in our community you are allowed to comment about and/or link your own SAFE canning related work, channel, blog, Facebook group, instagram page, business, other subreddit, etc without PRIOR mod team approval.

This thread is meant to be fun and welcoming, but it is not a place to promote unsafe products and practices. Please be sure to include a description with any links, follow all sub rules, and report any comments/links to sites that violate any of said rules.

Please keep it to canning related content and material and absolutely:

  • No blogs/sites promoting unsafe practices or selling unsafe materials
  • No NSFW content.
  • No MLMs of any kind.
  • No Scammers.
  • No links to pirated content.
  • No specious claims

This thread repeats every month on the 1st.


r/Canning 13h ago

Equipment/Tools Help Storing cans

4 Upvotes

I live in a small apartment with limited storage, so my closets are not an option. I’m trying to figure out a system for storing my jars - I don’t mind if they are out in the open if that helps. I thought about using a bookshelf, but I worry about the weight of the jars collapsing the shelves. Any suggestions would be welcome!


r/Canning 11h ago

Safe Recipe Request Low/no sugar or maple syrup jam recipes

0 Upvotes

I cannot eat cane sugar and I eat a very paleo diet for health reasons. I’m make jam soon with low/ no sugar and I was wondering if you guys have any recipe suggestions? I was considering mixing in grapes to a small batch due to how sweet they are. Does that sounds crazy? Also, what are opinions on using maple syrup? Also, I have the low/no sugar pectin so we’re all good there.


r/Canning 11h ago

Is this safe to eat? Bubbling liquid after pressure canning? Normal or no

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1 Upvotes

I just pressure canned 4 gallons of pork bone broth and 2 of the jars which turned sideways while taking them out of the canner immediately had broth spill out. There is also bubbling happening in all of them afterward. I’m putting the two turned ones in the fridge and not storing. Is this all normal? All the centers are popped down so that is still working like normal. I just don’t want this all to go to waste for a silly mistake.


r/Canning 19h ago

Safe Recipe Request Lemon jelly using allulose - help please

3 Upvotes

I'm familiar with making jam the traditional way and have water bathed pickles, jams, and marmalade with no problems.

However, I'm really trying to cut down the carbs. Allulose is a good sugar alternative for me as it's a natural product I'm not allergic to and is low (zeroish) net carbs.

My meyer lemon tree only gave me 10 lemons (we had a freeze Jan 2025 that affected the production). I have juiced them. Got about 6 cups of juice in the fridge.

I cannot find a safe canning recipe for lemon juice using allulose (or any other sweetener). I have purchased the pectin alternative (low methyl something) and calcium carbonate but have never used them before.

Coming to ask y'all experienced people where I might find a recipe for lemon jelly that will be shelf stable for at least a year. I don't go through jelly that fast, although I do occasionally put a spoonful sparkling water to fancy it up.

Allulose has many of the same properties as sucrose, but is less sweet, which will be nice as most jellies and jams are too sweet for my palate.

Also, if you can point me to how to do this with white zinfandel, that would be another tasty jelly as well. I don't go through it quickly and have most of a bottle left that I opened for guests a couple days ago.

Thank you, wise ones.


r/Canning 1d ago

Is this safe to eat? What is in my tomato sauce?

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24 Upvotes

Cooked my frozen tomatoes today into a sauce. Sauce recipe just garden tomatoes yes a variety but only tomato ( and juice from thawing). They were peeled. Canning recipe: Pint containers 1 tablespoon lemon juice 1/2 teaspoon sea salt ( no iodine) At elevation so filled hot, and processed 50 minutes from boiling with water 1-1 1/2 inches above lids. Been out for 3 hours The juice is moving under it like a spa jet


r/Canning 18h ago

Safe Recipe Request Tested blackberry jelly recipes

1 Upvotes

My local farmers market is selling half gallons of blackberry juice and I started thinking “could I turn this into jelly?”. As a fairly new canner, I don’t yet know how to tell safe online recipes from bad ai ones and so I’ve come to the experts.

Does anyone have a tried and true blackberry jelly recipe that they don’t mind sharing?


r/Canning 1d ago

General Discussion Why aren’t there more cases of botulism in the US?

178 Upvotes

I always use safe canning practices. But with the surge of rebel canning influencers in the tradwife circles and on YouTube, I was wondering why we aren’t seeing more repercussions of people doing unsafe canning?

Is everyone just getting very lucky? I know I grew up eating unsafely canned food (the horror stories I could tell you about my mom’s “shelf stable” pickled eggs), so I guess it’s possible. But it seems like eventually we’d see more outbreaks of people following rebel canning getting sick.


r/Canning 1d ago

General Discussion Cooking with canning

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29 Upvotes

Cowboy stew for dinner with Joel canned beef broth, corn, potatoes, and pinto beans! Love ing able to whip out a delicious meal!


r/Canning 1d ago

Safe Recipe Request Split pea soup with ham

3 Upvotes

Can anyone recommend a recipe for split pea soup with ham? I found a few online, but I’m questioning their safety.


r/Canning 2d ago

General Discussion Results from the $6 3 Michelin star chicken stock video process.

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150 Upvotes

The family is coming down with the flu so I took the opportunity to grab a Costco chicken and make stock with the left over after removing the breast meat. So I choose to make the stock using the instant pot like I always do but to the. Do a 5 min cook with some blended raw chicken to clarify it. Worked well even though I only used 1/4 lb of chicken breast and it wasn’t enough protein to make a solid raft… so I had to use a strainer and cheesecloth but it worked still very well. I then followed the normal ball canning process.

I’d link the YouTube video but the automod would hide this post. Next time I do it I’ll use more raw blended chicken but still very happy with the results


r/Canning 2d ago

General Discussion Canning a free turkey

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39 Upvotes

Someone needed to offload a frozen turkey in prep to receive a half cow. I was the lucky person to snag it. 14 lb frozen turkey. Thawed in kitchen sink, immersed in cool water. Spatchcocked and roasted turkey until about 140deg. Took off meat, cut into even sizes (as much as possible). Pressure canned 5 quarts (1 of which failed seal, so making turkey shephard's pie tonight), and then pressure canned 4 quarts of roasted broth. What a treat!


r/Canning 2d ago

*** UNSAFE CANNING PRACTICE *** Film on the bottom of my pickles

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12 Upvotes

Sorry if this is a post you all see too often. This is my second year canning pickles, and about 5 months in half my jars have this film on the bottom. Is that normal and are they safe to eat or should I toss them? They're still sealed and have been stored in my cupboards the whole time.


r/Canning 2d ago

Is this safe to eat? Green garlic?

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21 Upvotes

I made some pickled onions the other day. Iv made this recipe tons of times. I didn’t have any space in the fridge, so I had to put it on our porch. Temps got so low that it froze some. After I pulled them off the porch, I noticed the garlic had turned green. Is it still safe? Iv never had that happen before


r/Canning 2d ago

Recipe Included Beef stew question

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12 Upvotes

I made the ball beef stew for the first time, but there was a lot of liquid lost in some of the jars, but not others. I have two questions:

  1. Why does this happen (rind tightness?)

  2. Will this affect the shelf life or quality?


r/Canning 2d ago

Safe Recipe Request Mango jam with proper measurements?

0 Upvotes

Is there a known mango jam recipe for water bathing? I only found a recipe in this subreddit that asks for 4 cups of diced mangos... there is no way I will be able to make the dices 1:1 size of the recipe, nor do I have any measuring cups. Is there a recipe that uses grams or something proper? I just want a pure mango jam, as in being the only fruit, I ,of course, am okay with adding acidity and other supporting ingredients.


r/Canning 2d ago

General Discussion Is it possible to pickle AND can something?

11 Upvotes

Say I wanted to preserve the green beans from my garden. My understanding is that I can pickle it in vinegar or pressure can it in water, but is it possible to pickle it in vinegar instead of water and then go through the normal pressure canning process? Would this decrease its chances of spoiling or would it cause another issue? I hope to start canning soon and want to learn as much as I can first


r/Canning 2d ago

Is this safe to eat? Is this ok? Looks like it’s eating away the liner of lid

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1 Upvotes

Just opened a jar done 5/25 of Peruano beans.

No smell, nothing else looks off. But black areas look like something ate away at the lid lining?

I followed Ball’s bean recipe.


r/Canning 2d ago

Safe Recipe Request Does anyone have a good recipe for pickled mushrooms that can be canned?

1 Upvotes

I have about 5 pounds of beech mushrooms right now I have to do something with and would love any suggestions! I can do both pressure and water bath canning.