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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
If I see the photo correctly, the plums from your tree are oval in shape and tend to be slightly smaller than what they stock in grocery stores today. They are known as Damon (D-a-m-s-o-n) plums, or Italian prune plums. The stupid computer insisted on spelling the name it’s own way. Correct way is in parentheses. They were very popular and available as recently as 5 or 6 years ago. I have talked to a few produce mgrs. and they give you a blank stare. One did say he looked them up and would order them but I never heard back. They were always available in August when I lived in the PA, NJ, DEL areas. Take good care of that tree. Those plums don’t need any pectin to make jam.
Thanks for sharing! Sadly one of our plum trees died and the other one didn’t produce this year due to a late frost. Hopefully next year will be better.
I am going to try and make this tonight, wish me luck!
how long does the jam last, I was hoping to give it out in Christmas hampers, will it be ok until then?
I assume I just keep it in a cool, dry place until I am ready to give it to my friends and family?
Claire, we stored ours up to a year so they will be great gifts for Christmas :D.
I grew up on Plum Preserves my grandmother made me. I haven’t had them since and no one has her recipe. I have this recipe boiling for the first round right now and it already tastes a lot like hers. I am so excited to do this for my grandchildren. THANK YOU!
You are welcome Shelley, I’m happy to hear that this recipe tastes like her :).
I was going to bake plum cake with the basket of plums I picked up at the Farmer’s Market but decided to try your jam instead. It comes very close to the kind of jam I grew up with……love the low sugar content…..lovely on toast with a cup of coffee this morning. More plums waiting to be cooked down today. Next on my list are the perogies (again some wonderful childhood memories here)………Thanks for sharing.
You are very welcome and thank you for the great review :).
I am new to canning this summer and have appreciated the various methods other canners have used – both new and old, including your oven method here with your plum jam! Women have been canning successfully long before “safety standards” were touted as gospel. 🙂 So I am very anxious to learn your oven method as well and I will be careful to watch my jars as they mature, looking for obvious signs of spoilage should there be any concern. Thanks for your recipe and I have begin my first batch this evening. You are a young inspiration. I’m only 68. Lol. 🙂
It’s so awesome to hear from you! I hope you enjoy the recipe 🙂
Hello! I am super excited to try this recipe I will let you know how it goes! I’m new to preserves and was wondering if the skin breaks down in to smaller bits? Thank you 😀
Some do and some don’t. It adds to the great texture in the jam :).
Really like the low sugar. Do you get a real ‘set’ once in the jars, or is it thick runny?
It’s thick but not runny. It’s not set like store-bought jams are where you could cut through it with a spoon.
Hi! Natasha –
I really like the look of this recepie and hope I’m able to find some good plums to make it with. I just LOVE the deep, rich purple you were able to get in your jars and hoped you would be able to give recommendations as to how to achieve this. Lemon juice? Using a certain type plum?
Thanks!
Hi Jessica, I don’t really have any special tips besides all of the details I’ve shared above.
we r making first time .lets see how it goes
I have never made jam before and my neighbor gave me a big bag of plums. I made this jam and it was great I got lots of compliments. Many thanks.
That’s wonderful! Thank you for sharing your great review 🙂
How long is the jam good for? We have a ton of plums growing on our tree in our backyard, and I was thinking these would make great Christmas/hostess gifts, but I didn’t know how long you could store the jam? Thanks!
We’ve had it canned for up to a year and I love the idea of giving jam as a gift! 🙂
The plums in the picture look like Stanley prune plums, an Italian style plum. I use them exclusively (they’re the only Italian style plum I’ve found here in SW Michigan) and my father used them for jam making for years. All our friend and family love the jam we make, though we don’t use the same cooking process.
What is the benefit of cooking and cooling several times?
It thickens with its natural pectin without needing added pectin. 🙂
Does it set in less actual cooking time? I cook mine for about an hour to get it to set – it supposedly needs to get to 220 degrees.
Do you mean in the oven or on the stove? I don’t use pectin so it takes awhile to get it to the right consistency without it.
Hi again – I have a lot of plums on my tree so I tried again and this time the recipe worked out great! I think the problem was that I pureed the plums with an immersion blender after the first or second boil last time. I was looking for a smoother texture. I think that probably altered the time needed for it to thicken. Anyhow, thanks!
I’m very happy to hear that it worked out, enjoy :D.
your recipe is better then my Oma’s
Thank you for sharing
That’s quite a compliment :). Thank you!
We just finished canning our jam yesterday. I was eating it this morning on some toast, it is so delicious.
For our first time, we decided to divide the recipe quantity by 4.
After the 3rd simmering round, the mixture was already pretty thick and tasted very good. Before the 4th time, we added our personal touch by pouring in 1/2 cup of our favorite black spiced rhum.
In response to other comments for some who had issue with your recipe: We made sure to pick plums that were not too ripe but instead just a bit firm. Also the skin is absolutely necessary. The skin is where the pectin is mostly concentrated in this fruit and is the reason why the jam is thickening so nicely.
I recommend your recipe!
That’s wonderful advice – thank you! I knew the skin was important but didn’t know that is where the pectin is concentrated. Thank you so much for sharing that! 🙂
Hi – I’m making this jam right now with Italian plums. I’m on the 4th boil and it’s still pretty runny so may do a 5th. I notice that the color, which started out a lovely pinkish/purple, is now more brown. In the pictures yours looked like it retained the bright color. Am I cooking it too long? If so how can I get it to firm up and retain the color? Thanks!
Any jam will turn darker in color if you boil for too long with each boil. Some plums are juicier than others so that may be why yours is a little more runny. It does thicken slightly as it cools though, so it’s up to you if you would like to boil it another time depending on how thick it is currently.
first time of making jam w/ cherry plums. this worked beautifully tho time cosuming w/ heat ups and cool downs. loved its simplicity.
I’m so happy you enjoyed the recipe! Thank you for the great review!
Thank you very much for your recipe, I made it with Turkish plum (bigger than your plums) ,taste is very delicious. My children loved this jam . I made plum jam for the first time in my life it was perfect:)
Wonderful! I’m so happy you and your children enjoyed it 🙂
I measured out 12 lbs of very ripe Shiro plums. The skins were so tart that I peeled them. I let it sit in sugar overnight and started boiling the next day. There was SO much juice in the bowl I was concerned how it would all boil down. I did the suggested 4 boils and it was super runny. So I kept on boiling. On the 6th boil I lost hope that it would ever get thick enough and I was just done. I cleaned and dried the jars in the oven as suggested, filled the jars with the hot plum liquid and baked at 350 for 15 min as suggested. The first jar I flipped flooded the counter. I tightened the others before flipping and another one still leaked. I tightened it again and flipped it again. For all of that work I only got 7 jars of “jam” and only 5 sealed. I have been making jam for many years and this was my first attempt at plum jam. I love plums and was so excited to try this. Honestly I’m quite disappointed and don’t feel it was worth all of the work especially when I ended up with syrup instead of jam. I won’t make plum jam again using this method.
It sounds like it might have been the type of plums you used. Also, I think with the plums I used, keeping the skins on contributed to the thicker consistency and the skins on these were not sour. That is a bummer. Thanks for sharing your experience with using shiro plums. My Mom grows them but we haven’t tried to make jam out of them because they are usually pretty small and difficult to pit and yes the skins are tart.
I’m confused that there is no WATER?????
No, there is no water. Make sure you don’t skip the first step with letting the plums and sugar sit for awhile. It releases enough juice to get it started and then the rest is released during cooking. If you add water, it will take you much longer to get it to your desired consistency.