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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
curious as to what part of this recipie removes the peel?
I don’t remove the peels. They add to the nice consistency of this jam. It’s also way easier!
hey Natasha, great recipe. Just doing my yellow plums and wanted a recipe with less sugar but gave a great jam. Your plums look like Italian Prune Plum…
Thanks LJ!
Making your plum jam right now, but with yellow plums. So delicious!
That does sounds really really good!
Can you sub brown sugar for the white? And if so what would the amount be? Equal? Less?
To be honest I haven’t tried that substitution. Using brown sugar will add a molasses flavor and it will cause it to be even darker in color. The sweetness level is the same so you should be able to sub straight across. I just haven’t tried it so I can’t really recommend it.
Love this recipe!!!
I have made all my jars and have a little left, not enough for another jar but too much to waste. What can I do with it!?
Any ideas?
Thanks Millie
I’d put it in a tupperware and refrigerate it and just enjoy it first :).
Followed the directions. SO excited for jam. Tasted great. However, when I went to turn the first jar over it practically exploded from the lid and made a HUGE – though yummy – mess.
Was it not tight enough to begin with? I gave the rest of the jars a slight tighten and no other exploded – thankfully.
THanks for helping this beginner canner!
Oh wow I’ve never had that happen before and I don’t believe my Mom has either. Yikes! Hopefully you didn’t get any burns. Did you possibly overfill it?
After making….
Can you put(jam) in freezer baggies and store(flat) in your freezor? And defrost them (baggies)as needed (then put in a glass container) in your fridge? Have not Ever made jam and I like the ease of just sugar & plums! Thank You!
We store the cans at room temperature once they are sealed, but you can make this as a freezer jam. I think that would work well.
In a canning class we were told NOT to turn the jars upside down as this can loosen the seal. You may not need a water bath canner. A large stock pot will work just as well. Be sure to put a circular cake cooling rack in the bottom to the glass jars aren’t resting on the bottom of the pan.
I need to find a circular cooking rack that will fit in my pot. That’s a great idea. Thank you!
Italian plums, or purnes. These make excellent dried plums, or fruit leather, wash dry, pit, pull into halfs, put in food dryer or over til dry.
I think I need to invest in a good food dryer. What brand do you like?
Hi Natasha I have a question regarding the cans and flipping them over. I did as you said but one can unscrewed I screwed it back up. Do you think it will be ok?
Yes it should still be fine and turning it over that way will help to create a seal.
Forgot to ask. I only have 5 lbs plums but I also have a lb of cherries. Can I add them and make half a batch?
That should work just fine too.
Do you really mean 12 lbs of plums?
Yes :).
Beautiful… finally, a plum jelly recipe that makes sense. Thank you!
Incredible color. My mom used to pour paraffin wax over her strawberry preserves to seal out all oxygen, then add the lid.
Can we do that with this or is that something that has been tossed by the wayside?
Site bookmarked 🙂
I’ve never heard of using wax so I’m not sure what to suggest about that. Sorry I’m not much help. Thanks for bookmarking and I hope you find many new favorite recipes here 🙂
Can someone tell me about how many plums would be a pound or how many cups of plums I should have for this recipe after I cut them up? I don’t have a scale to measure out 12 pounds.
1 lb is about 6-8, two-inch-wide plums. I want to say it was about 30 cups… maybe? You’ll definitely want to add sugar to taste.
Thanks for this really simple recipe. Plums are a luxury item here, & I will make a really small quantity, so I hope I’ll be able to “do” over the weekend 🙂 It’s the first time I’ll make any jam, & it is because I LOVE the natural happy bright red colour of plum 🙂 Really glad I found your recipe.
I hope you enjoy the recipe and have a great weekend!
care to clarify why yoy flip them upside down?
It helps to seal the lids.
those are not santa rosa plums they are satsuma plums
I have made this recipe several times. Its the best. You explain everything so well too. Thanks a bunch.
Thank you Jen for such a sweet review and you are very welcome :).
Thank you so much Jen for your awesome feedback 🙂
Natasha, it has been scientifically determined that you do not need to sterilize the CLEAN jars and lids before filling, as long as you will be processing the filled jars for at least ten minutes in a boiling water bath. You can improvise a canning kettle with a stock pot if you don’t want to invest in more equipment. Find a rack that fits the bottom to keep the jars from touching the bottom of the pot, or just use a wadded up tea towel to accomplish the same things. Jar-lifting tongs would be the one piece of equipment I’d definitely buy, to get jars safely in and out of the kettle full of hot water. I’ll be trying your recipe this week, as I have a lot of small, sour stone fruit in my CSA box.
Thank you so much for sharing your tips for those of us who don’t have the canning equipment. You’re awesome!! 🙂
I just took my jam jars out of the oven. First time using this method. I flipped the first jar upside down and plum jam ran everywhere. Have you ever had this happen? I waited until I heard the pop before flipping the others. 🙁
I haven’t had that experience. Maybe your lids were on too loose? Or could they have been overfilled?