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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
After five sets of boiling/cooling, my jam is still thinner than I would like. Can I try to bring it up to 220F at this point? That’s always worked for me in the past. Thanks!
Hi Rosemarie, You can boil it down again to get it thicker. The type of plums can make a difference as some are juicier than others.
Hi Natasha! I’m in the process of making this jam as I write this – I’m cooling down from the 3rd boil. Roughly, how long does it usually take to get to room temperature? I’m giving it about 90 minutes, and although it’s still warm to the touch, I can touch the sides of the pot with my hands. It’s French cast enamel cookware. Should I let it cool down for a longer period of time? I’m thinking about stopping now, covering it soon, and resuming again in the morning.
Or – would I be able to hard boil this now (or completely instead of the multiple steps) up to 220F? I’m impatient!
Thanks – I’m loving your recipes. I’ve been making jams all summer – a first timer new hobby!
Hi Rosemarie, the process took me 2 days so I definitely waited more than 90 minutes. It would be rushing at 90 minutes but it still may work, although you may need to heat it an extra time for it to thicken properly (depending on the type of plums used).
I don’t see the mention of removing skin from plums. How and when please.
Hi Suzanne, this is a no-peel recipe, meaning you don’t have to peel these plums! We have a few notes throughout the recipe and in the title for you. I hope that helps.
The recipe does not have/state lemon juice. How much would you put in? I’m hoping to do this weekend.
Hi Audrey, I’ve never found it necessary with plums. If you have a variety of plums that are ultra-sweet (including the skins), you might add some lemon juice. It really is also a taste preference – it won’t spoil your plum jam to add some lemon juice 🙂
Perfect thanks and just wanted to say I really enjoy your recipes/videos. Everyone that I’ve tried has been fantastic! 👍 especially the chicken pot pie! 😋 have a good evening. I’m preparing some plum jam now. 😊
Great to hear that, Audrey! I hope you love all the recipes that you will try.
Hi there – just trying this and it is SO good! My question is about the canning process/sealing. If the tops do form a seal, is it still the best plan to refrigerate and use within 3 months? Or does a correct seal change the shelf-life?
Also, my jam reduced down so much, that I had one jar that I could only fill halfway – do I treat that one differently? Thanks so much!
Hi Kristen, if the jars are canned properly and form a seal, they have a much longer shelf life and would not need to be refrigerated until they are opened. If only filling halfway, I would refrigerate that one and use it first.
Hi Natasha! I made this over the weekend (I did it over three days starting Saturday) with Stanley plums I picked from the orchard near me. This turned out GORGEOUSLY! Initially I was like ‘I’m sure we don’t REALLY need to do this four times’ but you weren’t kidding how each time it thickens and condenses so much. I’m finally eating the jam with some yogurt now and it’s SO tasty. I followed all your steps but left the sugar + freshly cut fruits out for a few hours rather than just one. Thank you for a brilliant recipe! PS this is my first post ever but the site is telling me this is a duplicate so might wanna see what’s up!!
You are so welcome, Mara. Really happy to know that you enjoyed it!
What does it mean if I still have some fairly large plum pieces left after 4 rounds of simmering?
Mine looks just like yours (hooray!) except for a few pieces of plum that haven’t been “jammified” yet, or something.
Thank you
Hi Peter, I’m wondering if some of them were too “green”?
Those are Stanley plums, or sometimes called Italian plums (in my neighborhood in Brooklyn)
Thank you so much for sharing that with me, Art!
If you havent got a canning pot an Easiyo Yogurt Maker works.
Thank you so much for sharing that with us, Jimmy! Genius idea!!
I’m so excited to try this, but have you ever tried using this recipe with wild plums?
Hi Lisa, it really depends on the variety of plums. One of our readers mentioned using wild plums, and the skins didn’t dissolve. There are some plums with thicker skins, but I think the skins add a 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 chunky. I like seeing the pieces of fruit in my jam 🙂 I hope you LOVE it! 🙂
thank you
So you just eat the peeling too?
Hi Peggy, that’s right, the peel stays on. If you cook the jam as many times as the recipe states, the peels should incorporate into the jam and add a nice texture without being bothersome.
Natasha, thanks for a simple recipe. I will do it some time this week. I have a question about the instruction for “new guidelines” in canning. You say “cover with 1″-2″ of water. Do you mean pour this much water into the pot with cans or really put enough water to cover the entire cans, including the lids with 1″ – 2” of water?
Hi Eugene, the recommendation is to cover the entire can including the lids with 1 to 2 inches of water.
Hi Natasha I was wondering if you could cook it only three times? as mine is really thickening up fast.
Hi Randy, that would work if you are using plums that are less juicy or seem to thicken faster.
Something came up so can I leave my plums longer than one hour that is the first step
Hi Jeanne, yes that will still be ok to leave them for a couple of hours.
Hello, would this recipe work for other fruits such as red currants? Thanks!
Hi Kat, The method is slightly different with various fruits; I haven’t tried it with red currant, unfortunately. We have this recipe for Peach Preserves you may like.
Hello.
Just getting started on this recipe. My plums have already started to soften, so when I added the sugar on the first step, they sugar was immediately dissolved. Should I still wait an hour before boiling?
H Jinelle, if your plums softened that quickly, you can proceed. It sounds like you had some very ripe plums.
Blessings and salutations! I just had some prune plums go on sale and I stocked up and I am very excited to make this. Do I have to can it? Or can I make it and put it in a jar and just start using it? Thank you.
Hi Ann, you can definitely start using it and store in the refrigerator instead.
Love, Love, Love the ease and outcome of this recipe. After the 2nd cooking the mixture started to burn on the bottom. I lowered the heat on the 3rd and 4th boilings, but the burning continued. The end product is still yummy, but any advice on how to avoid the burning in the future? We tried to minimilize the stirring.
Hi Laurie, the culprit is having the pot over too high of heat and a thinner bottom pot is most susceptible to scorching.
Thank you for your wonderful help love your recipes.
You’re welcome! I’m so happy you’re enjoying our recipes, Simone!
I’m so glad I found this post because I’ve just made the most incredible plum jam using it! I think this is now my go-to recipe and technique!
Yay, that is fantastic feedback. Thank you so much for your review, glad you loved it!