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We’re on a canning spree this week. The air is crisp and the mornings are cool. We’re surrounded by a fiery array of leaves that rustle in the warm afternoon breeze. Fall is in the air and canning just feels right this time of year.
I could eat this plum jam by the spoonful; paired with a hot mug of tea (I’m totally day dreaming here)… Our tiny plum tree overproduces the most amazing little plums every year. I wish I could name this variety; anyone recognize these little beauties?
This recipe is really a cross between plum jam and plum preserves. It still has some of it’s preserve-like plum chunks, but it’s nice and thick and spreads beautifully. It’s awesome paired with breakfast pancakes or crepes. Oh and this would make the sweetest Christmas gift!
Home Canning Tools:
- 8 pint-sized jars with lids. I purchased them at Walmart.
- Large Stock Pot (20Qt+) with Rack (or purchase a canner)
- Jar lifter to safely transfer the jars
How to Make Plum Jam:
Cooking the Preserves:
1. Cut 12 lbs of plums in half, pit them and place in a large mixing bowl. Drizzle well with 4 1/2 cups sugar. Using a large spoon, stir plums with sugar until all are coated. If your plums are overripe or already very sweet, you may only need 4 cups of sugar total. You can add more sugar to taste while its cooking. Let plums sit at room temp with the sugar for about 1 hour, or until sugar is somewhat dissolved.
2. Transfer plums/sugar mixture in to a large cooking pot. Place it on the stove uncovered and bring to a boil, stirring occasionally. Make sure if you see a light boil to stir because the whole pot may not be boiling, just the center. If it stops boiling after you stir it, continue boiling until everything is uniformly bubbling, then simmer for 10 minutes and turn off the heat. Let the pot stand uncovered until it is just warm to the touch or reaches room temp.
3. As soon as it cools, repeat step 2 the same way – simmering 10 minutes. You will bring it to a simmer a total of 4 times, stirring to prevent scorching the bottom. This is why it takes 2 days to make. It’s really easy though and so worthwhile! There’s no “set” waiting time between boilings. If 2 days doesn’t work for you, by all means, take 3 days. Preserves have plenty of sugar so they won’t spoil at room temp if you leave it on the counter overnight. If you want the preserves to have an even thicker consistency, you can boil it 5-6 times if you wish.
(Note: the fourth time you boil, bring it to a boil over a little lower heat and stir a few extra times to prevent scorching. Also, it thickens more as it cools. If using a different type of plum, I suggest adding sugar to taste in case they are more tart)
4. The last time you bring it to a boil you will want to transfer it to sterilized jars while it’s boiling hot.
To sterilize the jars:
1. Start by washing your jars and lids with warm water and soap then let them dry in the oven at 215 for about 20 min or until completely dry. Boil the lids 5 min.
2. Transfer your boiling hot jam to the jars using a glass measuring cup and a funnel (least messy method) leaving about 1/2″ space.
3. Screw the lids on enough to keep a tight seal in place but don’t over-tighten them since air bubbles need to be able to escape.
Current Canning Guidelines:
Get up to date on the most recent canning guidelines here. It’s a great resource to answer frequently asked canning questions. Current guidelines recommend the following process (instead of oven canning):
- Place packed cans into the canning pot and cover with 1-2 inches of water. Bring to a boil and process 15 minutes.
- Remove from the pot and leave at room temperature undisturbed for 12-24 hours. You may hear a pop when the jars fully seal.
- After 24 hours, check that the seal has formed by pushing down on the center of the lid – it should not move at all. If the seal does not form, refrigerate jam and enjoy within 3 months.
Now don’t you want to curl up with a jar of that?
Plum Jam Recipe (No Peel, No Pectin!)

Ingredients
- 12 lbs sweet ripe plums, rinsed
- 4 1/2 cups granulated sugar
- 8 pint-sized jars with lids.
Instructions
- Place pitted and halved plums into the mixing bowl & drizzle with 4 1/2 cups of sugar. Stir plums until all coated with sugar. Let them sit for 1 hour then transfer the mixture into a large cooking pot.
- Bring it to a boil uncovered, stirring occasionally. Boil until the mixture is bubbling uniformly. Simmer for 10 minutes then turn off the heat. Cool to room temperature.
- Repeat step 2 a total of FOUR times. Last time bringing it to a boil at the lower temperature, stirring frequently to prevent scorching.
To Sterilize Your Jars:
- Start by washing your jars and lids with warm water and soap then let them dry in the oven at 215 for about 20 min or until completely dry. Boil the lids 5 min.
Filling and processing your jam:
- Transfer your boiling hot jam to the jars using a glass measuring cup and a funnel (least messy method) leaving about 1/2″ space.
- Screw the lids on enough to keep a tight seal in place but don't over-tighten them since air bubbles need to be able to escape.
- Place packed cans into the canning pot and cover with 1-2 inches of water. Bring to a boil and process 15 minutes. Remove from the pot and leave at room temperature undisturbed for 12-24 hours. You may hear a pop when the jars fully seal. After 24 hours, check that the seal has formed by pushing down on the center of the lid - it should not move at all. If the seal does not form, refrigerate jam and enjoy within 3 months.
Nutrition Per Serving
Recipe updated in 2019 to reflect new canning standards. Previously we used the oven method: screw the lids on enough to keep a tight seal in place but don’t over-tighten them since air bubbles need to be able to escape and place in the oven at 350˚F for 15 min then carefully remove from oven, flip upside down and let cool to room temperature.
Signs of Spoiled Canned Food:
With any type of canning, we follow this advice: “When in doubt, throw it out”
Discard and do not eat or taste any canned food if you notice any of the following:
- the jar is leaking, bulging, or swollen
- the jar looks damaged, cracked, or abnormal
- the jar spurts foam or liquid upon opening
- the canned food is discolored, moldy, mushy, slimy, or smells bad
I have a question: do you put the filled jars in a water bath canner after you have let them cool over night? I have a friend who just flips them and does not can them in a canner.
At the end of canning guidelines it talks about pickles, so I’m not sure if you were just giving general guidelines or if you are suppose to can the jam in the canner.
Hi Becky, I went ahead and clarified in the post that the new canning guidelines are instead of the oven step. The pickles were a typo. Fixed and thanks for catching that!
Thank you for this great Plum recipe. Turned out perfectly.
I’m so glad you enjoyed it!
Okay. I have a friend who has a beautiful organic orcard. I picked all the plums that were so heavy with friut and decided to make a jam. The plums were of different snd varied sizes…that i decided to not de- seed. (I de seeded later. )0Way more than the amont of plums ypu recommend.
I have added the four cups of sugar. I have tasted the plum jam. It is heavenly. I am now doing the final step. Thankyou for your input and info. It has been wonderful. I did use less sugar ( diabetic family members) and it is wonderful. (The taste) .thankyou so much for your site!
Thank you so much for sharing that with me.
This is my very first time trying out a jam. I thought I had mason jars, but unfortunately I do not. I blame it on the cats. Is it possible to just use Tupperware and leaving them out overnight?
Hi Natasha ! I have a timing question for you . I started my second simmer and am almost through that . I won’t have time to do the third until after work tonight at ten pm …perfect because the jam will be cooled by then ! and so tomorrow is Wednesday and I will be able to do two more simmers before I go to work at 5 pm…after work on Wednsday night I have to get right to sleep and get up very early for a double shift on Thursday…so no time on Thursday to do anything with my jam …I should have done FOUR simmers by then and cannot adres it again until Friday morning …can leave it on the counter from Wednesday afternoon until Friday morning where I plan to do a fifth possibly sixth simmer and then can and finish in the oven ??? Or do I need to stick the pot in the fridge after it has cooled on Wednesday night ?
Hi Selina, I would keep it covered after it reaches room temperature to keep bugs or dust out, but I have taken 3 days to make jam before and it has plenty of sugar to keep it from spoiling.
Thank you : ) I’m super pleased with the taste and consistency so far : )
I’m so glad you enjoyed it!
Hi Natasha …I am a first time jam maker and am using your recipe and so far so good …I am on the second simmer and I think it is going well …I has 18 lbs of plumbs and ( 135 plumbs ) I used 4 cups of raw sugar …now that I am tasting it …I feel it needs a little more sugar …so I have some brown sugar on hand that I may add otherwise, I’ll go get more raw sugar to add at the last simmer : ) I am cooking my batch on very very low heat …I love the way it looks and tastes and smells …I am on the right track !!! Thank you for this easy recipe …I can’t wait to try it finshied …P.S. I am going to add some fine chopped jalapeno to a few of the jars : )
Thank you for sharing that with us!bI hope you love this recipe.
At what stage would you add the jalapeno?
This is such a great recipe. Thank you! Next step to swirl it into a coffee cake.
I’m so glad you enjoyed it!
Hi there, just finished everything, oddly enjoyed one flipped jar is still bubbling away (over an hour now), any thoughts? It’s not near the stove or anything, it’s quite bizarre, I don’t think that’s normal!? They they great though, I used wild yellow plums, can’t wait to try it tomorrow! Do I freeze the jars or not? Thanks for the recipe!
Hi Andrea, without being there it is hard to say, was that jar possible more centered or have a more direct heat source that the others?
When I took the jam out of the oven and flipped over 1 jar the jam seeped out of the lid creating a mess. I’m afraid to flip over the rest as I don’t want to ruin the seal on all of them. Will they seal if I don’t flip them?
It’s hard to say without being there Shannon, I recommend seeing all the tips in the recipe post and comments to be sure a step wasn’t missed.
My jam is not getting thick ??? I’m on my 4th cook series . I don’t know what else to do at this point ???
Hi Jan, I’m more than happy to troubleshoot. Allowing it to cool and re-warm helps for the jam to thicken naturally without requiring pectin.
I was looking for a plum jam recipe that didn’t call for a ton of sugar, and even though this looked labor intensive I was willing to give it a shot. I shouldn’t have. The end result is yummy but it took over 12 hours to get there. And it never set, so I have chunky plum syrup. And I don’t mess around with funky canning methods so I let the jars cool overnight and placed them in the freezer; botulism is not worth the risk.
All in all, The recipe tastes great but is WAY too time consuming for syrup. Not worth it.
Hi Leslie, this natural plum jam is time-consuming but easy since it’s very little active time. It would be syrup after just 12 hours. I would suggest completing all of the steps for a more desirable jam consistency.
How long should the can stay upside down? Thanks for the recipe!
Hi Aiko, you want to keep them upside down until they reach room temperature. We usually just leave them overnight to cool completely.
Down to my last boil, it will be sitting overnight im going to finish it in the morning, I have tasted it and it has a delicious flavor, my question is do you know if this process can be used with any fresh fruit?
That’s so exciting Sue! It’s really difficult to guess without making a batch with specific fruit and measuring exactly and it also depends on how sweet your fruit is.
look like victoria plums to me
Thank you for sharing that with us!
I made the jam 2 days ago, using this recipe, but I did not can it. It’s currently in my fridge. Am I able to can it now?
Hi Nidia, at this point, it would be best to keep it refrigerated or frozen if you made too much to consume within about 6 months.
I think these might be Cherry Plums ( Prunus Cerasifera ). We have several of these trees in the yard. They are very generous producers. Every year, I make cherry plum wine. There are red cherry plums, and yellow ones. The yelllow ones are the tastiest.
Thank you so much for sharing that with me.
I was wondering why you do four distinct boilings of the fruit? What does this do? Could you just cook the fruit for a longer period of time? Thank you.
HI Dorothy, if you boil the mixture for too long, it will darken in color. Also, allowing it to cool and re-warm helps for the jam to thicken naturally without requiring pectin.
How many cups of cut up plums make a pound. I don’t have scale to weigh plums coming from our tree.
Hi Christine, you don’t necessarily need a kitchen scale – a rough measure on a bathroom scale would also be a good way to double check since not all scales are created equal. You can get on the scale with the empty bowl then get on the scale with the filled bowl of plums and find the difference to get a rough weight. I didn’t measure them in cups but just to give you a rough idea: 1 lb for me was about 6-8, two-inch-wide plums. I want to say it was about 30 cups… maybe?
Fantastic recipe!
I tweaked it ever so slightly.
Cooked a total of 5 times (including the last round) but added more plums during the 4 boil. These did not break down as much so I’ve got chunks of plum in the preserves. I also added mint which brought a wonderful addition to the tartness of preserves.
I’m so happy you enjoyed that. Thank you for sharing that with us, Peter!
Taste very good. So i put them in the oven, and when I took them out they popped and sealed. Does this mean I don’t have to use my pressure canner pot?
Hi, this recipe sounds great, is there any possibility of having the measurements in grams please? Our cups measurements are different in Australia. Thank you!
Hi Marj, I added the measurements in grams just for you 🙂 We are slowly but surely getting through the recipes to add gram measurements 🙂
I am a diabetic and was wondering if I could use a non-sugar sweetener for this recipe. As well, I’ve never canned jam before, so say a prayer! Haha!
Hi Mark! I haven’t tried that bu our readers have reported that working well. Here is what one of them said: “I am type 2 diabetic too and I make not plum jam but the traditional Polish version called “powidla”. There is no sugar added. It agrees with my diabetes just fine. As many traditional recipes, this one takes a lot of time and work but very little ingredients. Basically plums, preferably late autumn ones, small and sweet, but any other ripe plums will do.
You just have to cook pitted plums for 3-4 days (more juicy plums take longer), about 4 hours a day – bring to boil that turn to low heat. Than let it cool in between.
At some point it’s more frying than cooking. Takes a lot of stirring, because from day 2 it can burn easily (if it burs, transfer to another pot avoiding scraping the burned bits from the bottom, they will be bitter).
Sounds tiring but it’s worth all this work.
At the end, when it’s all cooked, you may add some sweetener. I suggest stevia. Powidla are sweet and tart, stewia is a bit insipid, goes well together.
But sucralose is fine too.
Don’t use acesulfam K or aspartam – it gives the worst aftertaste to plums. I’ve made that mistake once. 5 kilos of plums into the drain. Uneatable.
When it’s cooked and sweetened, just bring it to the boil one last time, transfer searing hot to the jars, close lids very tightly and stand upside down on a kitchen towel until they are cool.
Than enjoy”
What is the shelf life for this? And does t need to be refrigerated? I want to send some to my friend in Holland but shipping takes about 7 days. Thank you!
Hi Gertie! if they are canned, their shelf life is a year or more.
Hi Natasha — so you don’t add any water to the mixture when you first put it on the stove? And how long does it take to get to that first boil? I’ve never canned before, but I can’t imagine how 12 lbs of plums come to a boil without any liquid…how do you do this?
No water needed at all. The plums will release a lot of water. It’s hard to say but watch it closely. Type of pan used makes a difference
It definitely works without adding water. I started on the lowest heat and stirred quite a bit in the beginning. As the plums started to release their liquid, I tweaked the heat up (medium low was the highest) to get it come to a boil once there was some liquid. In subsequent boils, you’ll need to be even more careful with the temp to not scorch.
yes! it did work without water. only issues now are that for some of the jars, some jam came out of the lid when the jars were in the oven. did that ruin the seal? also, now that i’ve turned the jars back right side up, the jam isn’t sinking to the bottom of the jar. any thoughts? thanks!
Hi, if jam has come out of the lid, it sounds like they may have been overfilled – make sure to leave space at the neck when filling the jars. If the lids are sunken in and do not make a popping sound when pressed in the center, most likely the seal has formed but if you are concerned about any of them, it’s always best to refrigerate and enjoy those jars first. If the jam is not sinking back to the bottom, the jam probably was thicker and this can be due to a variety of factors such as cooking time (reducing down the jam longer would make it thicker, or using a plum that releases less juice). I hope that helps!
it does! only concern is that i can’t be sure if the top isn’t moving because there is jam in the top or because it’s actually sealed. will the jame eventually sink back down?
If there is room for it to sink, but if it’s overfilled there is no where for it to go really. If you are not sure I recommend leaving it in the fridge and using that jar first.
Very well done recipe. I added 1/2 cup red wine… because to me, everything is better with a little vino. 😃
That’s a great idea, Jacob! Thank you for sharing that!
Are the skins suppose to break down completely?
Hi Hope! It really depends on the variety of plums. There are some plums with thicker skins but I think the skins add nice texture to the jam. It would be ok to mash it if you wanted it to be more of a puree consistency but we prefer it slightly chunk. I like seeing the pieces of fruit in my jam 🙂 I hope you LOVE it! 🙂