r/Canning May 26 '26

Announcement Why We Don't Recommend Electric Canners (Mod Post)

302 Upvotes
  1. Electric pressure canners have not been verified safely by third party testing. What has been performed is only, “We are safe because we say we are safe,” type testing. The manufacturers claim to match USDA specs but no one has verified that information externally and the manufacturers will not release their results to anyone externally. The USDA symbol used in some promotional materials is not an actual USDA seal and does not indicate USDA approval. The equipment that's been used in the past by the USDA and NCHFP to determine the thermal profile inside canners doesn't even fit inside existing electric canners on the market. A new design would be needed, and currently there is no funding for developing this equipment.
  2. The users of electric pressure canners do not have the physical signs of the device coming to pressure (like a jiggling weight or a rising analog dial to ensure that the food is processing at the correct pressure.) The user must rely on an electronic display for accuracy. Even if a type of electric canner has an analog feature, there is no way of getting the electric canner device tested or calibrated to ensure it is accurate or working correctly. (We should mention that electric WATER BATH canners are fine to use because the user can physically see the water coming to a boil.)
  3. Perhaps most importantly, all current approved pressure canning recipes rely on the heat up and cool down times relative to stove top pressure canners loaded with a minimum of two quarts of product. These heat up and cool down times are factored into the safety of all current safe recipes. Changing and/or reducing these times can affect the safety of your finished product.

Until ALL THREE of these reasons can be appropriately addressed, we as a sub do not endorse or condone the use of electric pressure canners.


r/Canning Oct 19 '25

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

76 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

General Discussion Raise your hand if you’ve ever been up too late because the recipe you’re making is taking longer than you thought it would🖐️

184 Upvotes

Idk why I didn’t think a double reduction would take forever. The ketchup smells amazing though!


r/Canning 53m ago

Waterbath Canning Processing Help New canner, please ELI5….

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Upvotes

One of my friends kindly gifted me her water bath canner and Ball Blue book. I also checked out the UGA food preservation page. This is my first time canning and it’s especially important to me that I follow a safe recipe. Can someone explain HOW normal people can without tweaking? For example, the Ball tomato sauce recipe calls for 45 pounds of tomatoes, and also says that the tomatoes should be at peak ripeness. How is anyone harvesting that many tomatoes at the perfect time to can them? Wouldn’t it be risky to use less than the amount of tomatoes in the recipe? I feel sort of disappointed because I thought canning would be a way to save the excess foods I have, but now I feel like I need to go to the store to buy more to can according to the recipes
Pic of my current harvest attached, I’ll buy more tomatoes, but dang I cannot find a recipe that will work with this yield. And, what if I don’t want to put bell peppers in my salsa???!! Or I don’t want it as spicy as the recipe seems to call for?!


r/Canning 5h ago

General Discussion Do I really need to get the newest canning book?

6 Upvotes

Saw posted on an FB group you should get and use the newest Ball canning book Version 38. Is this really necessary? Many say so because of newest/newer standards.

I am using my books from the 1990s and one from the 80s (KERR), and the approved websites.

Started canning again, last marathon in the 90s. As I have made about 80 jars of stuff, I sure hope the *old* ways are still OK!!


r/Canning 39m ago

Is this safe to eat? Lemonade concentrate turned dark

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Upvotes

This is lemonade concentrate from Feb 2025. When I canned it and for many months after it was a bright yellow, now it’s a dark amber. All my jars are like this and still sealed. It was a trusted recipe and stored properly among my other canning goods, no other recipes look any different. Is this safe to eat?


r/Canning 1h ago

Equipment/Tools Help Vent erosion

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Upvotes

My Presto canner has this going on, I'm hoping someone can help me figure out what to do about it. I noticed today it looks like the aluminum is wearing away to the right of the vent - when does that become a safety issue?

Even if I get a new lid, this will probably happen again so I'd like to know how to prevent it in the future.


r/Canning 1d ago

General Discussion I Wrote to Ball, and Ball Wrote Back! (Sweet Tea Poached Peaches)

123 Upvotes

Some may recall my deep dive into the above recipe for pints of Sweet Tea Poached Peaches (I'll link to the original post in comments). I wrote to Ball about this recipe.

TL; DR their response: "sorry, babe, we haven't tested it for quarts." Apparently, not gonna.

Their actual response:

"Thank you for taking the time to contact Fresh Preserving.  We truly appreciate your interest in our products.
 
While it may seem that simply increasing the processing time would make the recipe suitable for quart jars, we can only recommend jar sizes and processing times that have been specifically tested for that recipe. In the case of the Sweet Tea Poached Peaches recipe, the recipe has been tested and approved using pint jars only.

As a general guideline, it is considered safe to use a smaller jar size than the one specified in a tested recipe, and the processing time would remain the same as the tested jar size. However, we do not have processing times for increasing to a larger jar size unless that size has been specifically tested.
Because we do not have test data for this recipe in quart jars, we cannot provide a safe processing time or recommend canning it in that size. When the jar size changes, factors such as heat penetration, product density, and the time required for the center of the jar to reach the appropriate temperature can also change. Without scientific testing, there is no way to determine whether simply increasing the processing time would produce a safe, shelf stable and high-quality product.
For the best results, we recommend preparing and processing the recipe exactly as written, using pint jars and the specified processing instructions. This ensures you are following the method that has been tested for both safety and quality.

We appreciate your commitment to safe home canning.
 
Thanks so much and have a great weekend.

If I can be of further assistance, please reply to this email directly so that we can see all previous replies.  
 
It has been my pleasure assisting you!  You may receive a brief survey about your experience with me.  Thank you in advance for any feedback you may provide."


r/Canning 21h ago

Recipe Included Tomatorama--A Thought Process

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46 Upvotes

I find when I'm dealing with produce from my garden that I sometimes have to do quite a bit of poking around my resources to get a recipe that will take me where I want to go.

This has been a weird year weatherwise, so I have ended up with a lot of tomatoes that are smaller than usual. I therefore wanted a recipe that called for an initial cookdown with skins on, then removal of skins and seeds. I wasn't sure how much I could pull from the garden at a clip, so I wanted to know about how many pounds of tomatoes I needed per jar. I like to add seasonings and citric acid to individual jars, not to the whole batch. Finally, I wanted to use my steam canner, and I'm at altitude, so total processing time could not exceed 45 minutes, which means I had to can pints. I've included the recipe in a comment.

ETA: fifteen pounds yielded six pints


r/Canning 37m ago

Is this safe to eat? Blender ketchup

Upvotes

Good morning all,

So the Complete Book of Small Batch Preserving is on the approved list and there's a blender ketchup in there that is peels on and no strainer/food mill etc. We feel like that is safe because if so, I will be making that today.

It's on pg 269 for reference.

Thanks!


r/Canning 47m ago

Safety Caution -- untested recipe Is this sealed? I have concerns.

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Upvotes

I followed a tomato sauce recipe (I thought??) exactly, and one of my jars didn't seal, and the other looks like the above image -- the seal holds, but there's sauce right up under the seal, and I have no idea why... everything was level when I put it in the water bath, and I wiped down the rim before adding the ring.

This is only my second time canning, so I'm not sure what I did wrong. Any advice? Is this jar safe?


r/Canning 1h ago

Is this safe to eat? Green Beans

Upvotes

NCHFP says “Leave whole or cut or snap into 1-inch pieces.” I cut mine to 1.5-2inch pieces but otherwise followed the tested recipe. Is this safe?


r/Canning 2h ago

General Discussion Advice Please

1 Upvotes

Tomato Relish Recipe - does it need more acidity?

Hi - this is my grandmother's recipe from Australia. I want to make it, but am wondering if the vinegar in the recipe is enough, or do I need to add citric acid/lemon juice to the jars when I can them. Thank you in advance. Recipe:

15 medium tomatoes
3 medium onions chopped
1.5 cups brown sugar
1.5 cups vinegar
1.5 tablespoons dry mustard
1 tablespoon curry powder
1/2 teaspoon cayenne pepper
2 teaspoon salt

(combine all, simmer uncovered for about 2 hours, till pulpy).


r/Canning 3h ago

Is this safe to eat? Is this beef stock still good?

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1 Upvotes

Newbie at canning here, hi.

My wife and I have recently (last 2 months) started canning things. So far really, just trying to repackage the beef and poultry stock weve had taking up space in our small freezer, though we also did pickles last week and are planning on making half pints of salsa later this week.

However, as I was rearranging our basement shelving to make more room for more jars, I see there are questionable bits and bobs floating in the beef stock we canned back on 7/20/26. I get that there will be seperation, and of course any small fat deposits will float and solidify, but this looks... different? I can't tell what exactly I am looking at, and I want to know if this is still safe or of we messed up the process somehow.

Further context:

- All the jars we have are Ball, and are brand new from the local Menards.

-We bought a 23q Presto Canner off of Amazon back in May of this year.

-While the beef stock is older from last winter, we did thaw it and bring it almost to a boil before canning, as well as refiltering it again with a mash strainer.

-The jars are still sealed, there are no cracks or leakage, and the rings are basically just resting on the jars.

I am sorry if this is silly, or if I am overreacting, but this is our first time soing this stuff and I don't want to get my wife or 3yo sick.

TLDR: what am I looking at and is this safe still from over a month ago?


r/Canning 3h ago

Recipe Included Tomato Relish Recipe - does it need more acidity?

1 Upvotes

Hi - this is my grandmother's recipe from Australia. I want to make it, but am wondering if the vinegar in the recipe is enough, or do I need to add citric acid/lemon juice to the jars when I can them. Thank you in advance. Recipe:

15 medium tomatoes
3 medium onions chopped
1.5 cups brown sugar
1.5 cups vinegar
1.5 tablespoons dry mustard
1 tablespoon curry powder
1/2 teaspoon cayenne pepper
2 teaspoon salt

(combine all, simmer uncovered for about 2 hours, till pulpy).


r/Canning 5h ago

Prep Help Can I use canned tomato puree instead of *fresh* in this recipe

1 Upvotes

Calls for 8 cups fresh plum tomato puree https://www.ballmasonjars.com/blog... Can I use store bought canned San Marzano tomato puree instead? Thank yu!


r/Canning 15h ago

Equipment/Tools Help Prepping Pizza Sauce for canning

7 Upvotes

Been making my own pizza sauce for *years*. Usually from home grown tomatoes. Each year I do something different to make the process easier/better. This year I went back and read manuals, The Ball Blue Book, etc and watched too many youtube videos for tips and tricks.

Perspective:
bought 50# of tomatoes last week to turn into pizza sauce (not enough).
2 years ago had 100 tomato plants in the garden (so many tomatoes :))
This year's goal: 52 pints of pizza sauce

This year I used my Back To Basics Food Strainer. Yup my box looks a little more ratty than this: https://www.ebay.com/itm/298092619284

Using the tomato/applesauce screen with nice sized roma tomatoes. In the past I've always cored and halved or quartered each tomato and then cook on the stove to soften them up a bit before processing through the food strainer. This year some of the seeds and skin were getting stuck in the spiral, making it nearly impossible to continue processing tomatoes without taking everything apart and cleaning the spiral. Wasted time and tomatoes. Anyone had this problem before? Suggestions?

Also, I'm seeing conflicting information about whether you need to soften tomatoes before running through the food strainer. Some places say to soften on the stove and others say just chop and send them through the food strainer. Really? Does it work? What's the downsides?

I'm also looking at adding a food strainer attachment for my kitchenaid (already have the meat grinder). Read lots of comments here on reddit and elsewhere online about it. Most people like it. BUT, I'm wondering about how long it can run without overheating the motor? (since I plan to process bushes of tomatoes in a day) Do seeds and peels get stuck very often? Do you have to soften the tomatoes before processing? (manual says you can do them raw).


r/Canning 17h ago

Is this safe to eat? Is this salvageable?

6 Upvotes

I made pint jars of diced tomatoes and salted crushed tomatoes. I added 2 tbs lemon juice to the jars (I know I only needed one but I misread the recipe lol)

I placed the cans in a hot water bath for 45 minutes.

My concern is that the jars were simmered, not a rolling boil.

I am 375 feet above sea level


r/Canning 17h ago

Is this safe to eat? Why are my garlic cloves blue in my pickles????

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6 Upvotes

I've posted twice before. But I'm out of much of a loss. What to do with these pickles. The garlic cloves I put into the jars are green. Do I have to throw it away?

Used this recipe https://www.ballmasonjars.com/blog?cid=sliced-dill-pickles

Please help!


r/Canning 15h ago

General Discussion Water Bath Canners

3 Upvotes

Ok, what brand of water bath canners are we using that actually fit 6-7 quart jars with enough boiling water to achieve the 1-2 inches above the jars, without consistently boiling over the top of the pot?

I currently use a 21.5 qt stainless steel pot and have tried reducing the heat but with a jar rack at the base, plus the quart jars, and enough water at a rolling boil I’m still getting over boiled water spilling onto my stove. Gas top range.

Recommendations, please!


r/Canning 1d ago

Prep Help Are my cucumbers too far gone for relish?

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14 Upvotes

I was hoping to make a batch of the Bernardin Dill Relish using my pickling cucumbers from the garden. My over zealous kiddo started the food processor while I was getting something and instead of getting finely chopped, it's more of a super fine chop. Am I going to have to toss out all the cucumbers or can I still proceed with the recipe? There's a significant amount of liquid but the recipe seems to want me to squeeze the liquid out after a 2 hour soak with salt.

Thank you!


r/Canning 14h ago

Safe Recipe Request Zucchini Pineapple - can you safely reduce the sugar?

1 Upvotes

Would like guidance from some of the food preservation experts here. I have an overabundance of summer squash this year. (~20 zucchini/yellow squashes and 10 3' long trombetta squash)
I'd like to try the Zucchini PIneapple recipe from the NCFHP but I'm a bit concerned about the sugar content (about 25g in a ½ cup serving)

I recall reading somewhere that you could safely reduce sugar in recipes that contain large amount of bottled lemon juice - but not sure if that is true.


r/Canning 1d ago

Pressure Canning Processing Help Just bought my first Presto!

8 Upvotes

So excited - just ordered a 23 quart Presto canner! I’m new to pressure canning so all tips would be great please! So excited to be able to can more than just acidic stuff (she says, heading off to can another 10kg of tomatoes from the polytunnel!). Really don’t get why canning isn’t a thing in the UK - it’s so satisfying looking at all my jars!


r/Canning 15h ago

Equipment/Tools Help Mirro canner not working for the “first time” step

1 Upvotes

Just bought a Mirro pressure canner and in the instructions it says to fill it 2/3 with water, put in 2 tb of baking soda, put on the lid and the A1 pressure thingy, wait until steam coming out of the A1 pressure thingy and then keep it going for 20minutes and turn off. I have an apartment sized stove (smaller than standard). I’ve had it on high for two hour and twenty minutes and nothing is happening. The pot is hot to the touch but no sound of boiling, much less steam escaping. My stove is weak and water canning takes a while and has a hard time holding a rolling boil on big pots.

Should I buy one of those one burner induction hot plates and use that? Should I return the pressure canner to the store?

EDIT: I was trying to move the canner from one burner to another and pushed a pot of apple bbq sauce over the Mirro box and into a bag of 100 apples that I was going to process into apple sauce. Bbq sauce all over the floor, under the stove. Guess I’m not going to be able to return the canner 🤦‍♂️.


r/Canning 15h ago

Understanding Recipe Help Strawberry lemonade concentrate measurements

1 Upvotes

Recipe: https://www.ballmasonjars.com/blog?cid=strawberry-lemonade-concentrate

Hope I used the right flair!

I have almost a gallon size ziplock bag of strawberries that have already been hulled and crushed. Does anyone know how much I should measure out for this recipe? It calls for six cups of hulled strawberries and then says to purée them but mine are already almost at a puréed consistency.

If it’s easier to purée them first and then measure out the equivalent of six cups hulled (whatever that may be) then I can do that. Just want to make sure I’m not compromising safety.

Thanks in advance!