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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
Your small dark plums look exactly like the plums off our tree (inside and out)
They are a variety called “Sprite” and are a plum x sour cherry cross .
( you might notice a cherry like flavor when they are cooked in the jam).
It’s the best producer of all our trees and they are wonderful fresh, frozen and in jams . I’m going to try your recipe this time :O) .
That’s great to know. Thanks Nora!
Making this recipe for the first time. Just finished my first boil. It is really tart. Yes the skins on my plums were tart. I added more sugar and it didn’t change. I am hoping with cooking down it will sweeten up. Should be an interesting wake up flavor on toast. I am sure it will not go to waste. It is not going to appeal to everyone. That’s why I only gave 3 stars.
If your skins are very tart, your jam will definitely need more sugar. There are so many varieties of plums out there. I’d recommend adding sugar to taste.
Hi!
I noticed that the plums of my backyard tree have a very sour skin (but the pulp is quite sweet) so I decided to pit and peel them. After this there’re almost no chunks of the fruit, so if the mix is already runny I can skip boiling it many times and just do it once for a couple of hours? I’ll be careful with the stirring… What do you think?
Boiling it repeatedly is what helps to make the jam thicker since there is no pectin added to the jam. If you only boil it a couple of hours, you will probably have a more liquid jam, which is ok if that is what you prefer.
Ok, but if I boil it long enough to make it thick (as long as it takes) is the same as if I doing it many times? Thanks for your reply! 😀
I learned this method from my Mom and we’ve always had the best results by boiling it multiple times. If you boil for too long at one time, the mixture might discolor and turn really dark. Also, there’s a much higher chance that you will scorch the bottom and it would take a long time to stand over it and boil it down to the right consistency versus doing the re-boiling method over a couple of days as outlined above.
This is the second time I’m making the Plum jam and it is better than the first time round, time and love is all you need.
Thank you Natasha, does this work with other fruits as well?
The method is slightly different with various fruits. I do have a recipe for peach preserves also: https://natashaskitchen.com/2012/08/26/country-peach-preserves/. I think the plums are the easiest because you don’t have to peel them.
I just made this recipe and boiled it three times and it’s really thick and the plans are still chunky
Did you use the same kind of plums? Some are juicier than others and require longer boiling. Also, if they were the same variety of plums – were they ripe enough? If the plums are still chunky after boiling three times, I wonder if they were under-ripe?
The balance of 12 lbs (4.5kg) for this recipe with only 4 1/2 cups of sugar seems off compared with every other plum jam recipe.
If your plums are very tart, you could use more, but this jam is boiled down probably more than the average jam recipe online so the end result is a thickened jam with less sugar :).
Thanks Natasha. I’ve picked a variety of plums from my local community garden, and I just have one question about the recipe. Do you calculate the 12lbs with the stones in or after you’ve pitted them?
I can’t wait to try this.
I weighed them with the stones. 🙂 Enjoy! I wish we had plums this time of year! What part of the world do you live in?
Thanks for the recipe. The jam turned out great.
Cheers
I’m so happy you liked it! Thanks Kim 🙂
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Thank you! That’s always good news 🙂
This jam is awesome! My only problem, and it could have been my plums, but some of the skin didn’t “jam”! Still absolutely delicious, but the pieces of skin aren’t the best (consistency wise) – and recommendations for this?
That can happen if the plums aren’t quite as ripe. Were your plums very firm?
I am cooking the plums. It looks like after the 1st 10 minutes, they are still in halves, only softer. At what point does the fruit soften down? I want to make sure I am doing this correctly,
Lisa, did you had them sit in the sugar first? Also did plums boil only in the center or uniformly, because they should boil uniformly after stirring. If the answer is yes to both, than you are on the right track :).
I just picked up our fallen plums from the ground after a wind storm. This is the first year our little tree has produced fruit so your recipe is very appealing to me. I don’t can, but would love to try it out with this recipe. My concern is, what happens to the plum skin? I can’t stand jams with peel in them, no matter how tasty they may be. Is there an easy way to skin the plums before I boil them?
The skins are hardly noticeable and incorporate very well with all the cooking in the recipe, but you could blanch the plums in hot water for 30 seconds and then peel the skins if you wanted to.
I tried your plum recipe. I can say that this is probably the best plum jam I have ever had! I used 1 cup of sugar for every 2 lbs. of fruit. I also boiled 5 times for the perfect consistency. It was a small batch, but I was just trying to use up some very ripe fruit my wife had brought home(dark prune plums). Sure glad I did!
My next project will be making my raspberry and blackberry jam from my own home grown fruit, previously fresh frozen from this years batch.
Have you tried other fruits with this method? Any success?
We’ve always made freezer jam with raspberries but not anything with a shelf life. I don’t see why you couldn’t make it work though. Let me know how it goes! I’m so happy to hear that you enjoyed the plum jam 🙂
Thanks for this wonderful recipe! This was my first time making anything with plums. I was looking for a recipe with less sugar, and yours was perfect. I only had 9 lbs of plums from our tree left after we ate some and gave some away, so I only used 3 cups of sugar. Otherwise I followed the recipe and boiled it 4 times. The peels didn’t cook down as much as I had hoped and there were a lot of rolled up peels throughout the mixture. Maybe it was because of the type of plum I used, I don’t know. Not sure of the variety, as we bought our home after the tree had been planted. The jam still turned out great and my family tried it on toast this morning and loved it. I will definitely use this recipe as my go-to plum jam recipe! Thanks again!
I’m so glad you enjoyed it. It could be that your plums had tougher skins, but I’m so glad you all enjoyed the jam anyway 🙂
Hi Natasha,
Thank you for the all the recipes you have here. Its very helpful being newly married and not knowing what to make haha. So when making this jam, have you tried blending everything before caning it?
No, I haven’t because I like the chunkier texture. I think if you blended it, it would be more of a butter or spread, but you can if that is what you’re looking for 🙂 I’m so happy you are enjoying the site and finding it useful! That’s so encouraging to hear 🙂
So do you not add any water to this recipe?
No water. Once the plums sit in sugar for awhile, they release enough juice to start cooking them and then they are plenty juicy while cooking. If you add water, it will take longer to boil them down to get them thick enough to be a jam.
Thank you for sharing this recipe. This is my first attempt at plum jam. I am using Flavor Heart Pluots and just finished the third simmer. The red color is lovely and the flavor amazing. The no-peel method is so easy and I was surprised how the pluot peels cook down. I will go back to my local farmer’s market for another 12 pounds of pluots for a second batch.
That’s wonderful! It sounds like you’re going to be enjoying this jam all winter long 🙂
I completed a smaller batch for the first time canning since I was a kid with my mom and grandma’s. I made 5 jars of a plum plus I added blueberries to the mix. I ended up boiling the filled jars for 10 minutes instead. All worked well! Thanks for posting a simple way to make jam! Off to try other canning now that I have the nerve to try.
That addition of blueberries sounds lovely! Thanks for sharing 🙂
I have boiled 3X and does not seem to be thickening??
Is that ok?
Can I still pour into jars after 4th time or???
ThaNKS
Hi Kathe, Did you let it cool in between boil downs? It is ok; you’ll just have a looser jam. Did you use different plums? Maybe your’s were juicier? If you want it a little thicker, just boil it another time; otherwise it’s completely safe to can them 🙂
I would like it to be thicker so this time i will cool overnight, however can I use pectin and how if this does not work? Thanks
I’ll be honest, I’ve never used pectin in any of my jams and my Mother doesn’t use it either so I can’t offer much advice for using it. We have always used the slow cook method to thicken it. Sorry that’s not super helpful.
Looks like all is good – I think I just needed to boil more times and it is thicker. Thanks
Thanks so much for this recipe. I have been wanting to make jam with plums from my plum tree and today was the first time I have done any canning. So far so good. Just waiting for them to cool to room temp so I can try it.
I’d love a cup full of your jam right now to spread on my toast. I know I wouldn’t necessary need the whole cup for toast, but I could always spoon the rest into my mouth ;).