![](\"https:\/\/www.fabfood4all.co.uk\/wp-content\/uploads\/2026\/07\/Seedless-Blackberry-Raspberry-Jam-5-488x1024.jpg\")
<\/div>\n1st prize-winning Seedless Blackberry & Raspberry Jam is smooth, intensely fruity, and made with just 4 ingredients and no pectin.<\/p>\n
This small-batch jam is a great way to use up wild blackberries and summer raspberries.<\/p>\n
![\"Pot](\"https:\/\/www.fabfood4all.co.uk\/wp-content\/uploads\/2026\/07\/Seedless-Blackberry-Raspberry-Jam-36-lra-pin-739x1024.jpg\")
<\/figure>\n<\/div>\nBackground<\/h2>\n
Every year since starting this blog, I\u2019ve entered our local Parish Day Horticultural Show, and this year was no different.<\/p>\n
I had no idea what I was going to enter, as none of my fruit bushes had produced much fruit in the current heatwave.<\/p>\n
With just five days to go, I went foraging for wild blackberries in our local park, hoping for some inspiration.\u00a0<\/p>\n
I\u2019ve never known blackberry season to start in July; it\u2019s usually August to September!<\/p>\n
I wanted to create a new recipe, so I considered making a plain Blackberry Jam.\u00a0<\/p>\n
However, looking at my wild blackberries, I realised that the jam would be extremely seedy and not have the best mouthfeel.<\/p>\n So I realised I should make a seedless jam, but I\u2019d already made and entered Seedless Blackberry Jam previously.<\/p>\n Opening the freezer, the answer stared me in the face: raspberries! I\u2019d make Seedless Blackberry & Raspberry Jam.<\/p>\n Fast forward to my first taste-tester, my daughter, who couldn\u2019t actually wait for the jam to cool before tasting!\u00a0<\/p>\n She said it was definitely a winner and the best jam she\u2019d ever tasted.<\/p>\n I wasn\u2019t convinced (you never know what the judges are looking for), but then my husband tried it, and he loved it too.<\/p>\n So I should have had more faith, as it went on to win 1st Prize. We haven\u2019t stopped having it with cream teas on my spelt scones since!<\/p>\n Always use fresh blackberries and raspberries, not mushy, overripe berries, for the best flavoured jam.<\/p>\n A few slightly underripe berries are fine and will add to pectin levels.<\/p>\n In an ideal world, you want to avoid berries that have been commercially grown using pesticides such as glyphosate (a common weed killer).<\/p>\n Organic berries are prohibitively expensive whether fresh or frozen. So that\u2019s why foraging for wild blackberries, which are naturally organic, is the best solution.<\/p>\n Just avoid picking blackberries from the side of the road where they are likely to pick up more pollution.<\/p>\n With raspberries, homegrown is the best option.<\/p>\n To clean shop-bought fresh or frozen berries, soak them for a minute or two in a solution of bicarbonate of soda (1 tsp to 475 ml cold water) and agitate.\u00a0<\/p>\n Then lift the berries out and rinse them well in a colander with cold water.\u00a0Don\u2019t worry about drying the berries as the excess water will be boiled away.<\/p>\n This will help to remove outer debris and some of the pesticide residue but not that which has been absorbed.<\/p>\n I\u2019m rarely ready to make jam on the same day as picking or harvesting berries.<\/p>\n Hence, I usually rinse and dry them, spread them out on a tray, and then freeze.\u00a0<\/p>\n Once frozen, I put them in a freezer bag (squeezing out excess air) and return them to the freezer.\u00a0<\/p>\n That way the berries don\u2019t clump together, and you can easily measure out your desired quantity.<\/p>\n Try to use the berries as soon as possible (at least within 3 months) for the best quality.<\/p>\n Wild blackberries are high in natural pectin due to their high concentration of seeds and dense cell walls. Cultivated blackberries contain a moderate amount of pectin, and raspberries a low amount.\u00a0<\/p>\n So in this recipe, I use fresh lemon juice to aid the gelling process.<\/p>\n If you use cultivated blackberries, you may need to boil the jam for slightly longer to reach the setting point due to their higher water content.<\/p>\n Get the full ingredients list and instructions in the Recipe Card at the end of this post.<\/p>\n You need just 4 ingredients:<\/p>\n In my previous 2 seedless jams (Blackberry and Raspberry), I added the sugar to the fruit, heated through to dissolve the sugar, and then sieved.<\/p>\n This time I wanted to make a slightly larger batch of seedless jam.\u00a0<\/p>\n Hence, I decided it was more practical to boil and simmer the berries to soften the wild blackberries, release all their juices, and then sieve.<\/p>\n The sieving process is a labour of love; it took me 20 minutes, but it\u2019s so worth the effort!\u00a0<\/p>\n I\u2019m sure a rotary food mill would have saved me a lot of time, so it\u2019s on my list to buy!<\/p>\n You could sub in other berries or use additional ones such as blueberries, elderberries, mulberries, boysenberries, etc. Just be aware that the timings may change.<\/p>\n The sugar-to-fruit ratio after sieving is 1:1, so feel free to reduce the sugar amount if you wish. You could easily shave off 100 grams.<\/p>\n Store unopened jam in a cool, dry, dark place. It is at its best for flavour and colour in the first 12 months but will be safe to eat for many years.<\/p>\n Once open, store the jam in the fridge where it will keep for many months if you always serve it with a clean spoon.<\/p>\n This seedless berry jam goes with so many things. Here are just a few ideas:<\/p>\n Here are some more berry preserves and jam recipes you should try:<\/p>\n Yes, but I would only do so if using a rotary food mill. You would need to allow extra time for the setting point to be reached.<\/p>\n<\/div>\n It\u2019s not necessary, as this jam is shelf-stable. If you wish to water bath, follow your jar manufacturer\u2019s guidance, as it\u2019s not something we do in the UK.<\/p>\n<\/div>\n<\/div>\n If you\u2019re looking for a small-batch, delicious homemade jam to use up a harvest of blackberries and raspberries, then this seedless berry jam recipe is for you!<\/p>\n I\u2019m sure your whole family will love it just like mine do!\u00a0<\/p>\n If you enter it into any competitions and win, then do let me know; I love hearing about your victories.<\/p>\n Pin Seedless Blackberry & Raspberry Jam for later:<\/p>\n Leave a comment and rating below when you\u2019ve made this recipe; I love getting your feedback! You can also share your pictures by tagging @FabFood4All<\/a> <\/strong>over on Instagram.<\/p>\n This 1st prize-winning Seedless Blackberry & Raspberry Jam is smooth, intensely fruity and made with just 4 ingredients and no pectin.<\/p>\n![\"Seedless](\"https:\/\/www.fabfood4all.co.uk\/wp-content\/uploads\/2026\/07\/Seedless-Blackberry-Raspberry-Jam-30-lr-914x1024.jpg\")
<\/figure>\n![\"Pot](\"https:\/\/www.fabfood4all.co.uk\/wp-content\/uploads\/2026\/07\/Seedless-Blackberry-Raspberry-Jam-15-lra-1024x772.jpg\")
<\/figure>\nWhy You Should Make Seedless Blackberry & Raspberry Jam<\/h2>\n
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![\"A](\"https:\/\/www.fabfood4all.co.uk\/wp-content\/uploads\/2026\/07\/Seedless-Blackberry-Raspberry-Jam-33-lr-698x1024.jpg\")
<\/figure>\n<\/div>\nChoosing the Best Blackberries & Raspberries<\/h2>\n
Cleaning Berries<\/h2>\n
![\"Blackberries](\"https:\/\/www.fabfood4all.co.uk\/wp-content\/uploads\/2021\/08\/Seedless-Blackberry-Jam-steps-19-lr-768x1024.jpg\")
<\/figure>\n<\/div>\nFreezing Blackberries & Raspberries<\/h2>\n
![\"Overhead](\"https:\/\/www.fabfood4all.co.uk\/wp-content\/uploads\/2026\/07\/Seedless-Blackberry-Raspberry-Jam-85-lr-1024x682.jpg\")
<\/figure>\nPectin Levels in Blackberries & Raspberries<\/h2>\n
How to Make Seedless Blackberry & Raspberry Jam<\/h2>\n
Ingredients<\/h3>\n
![\"Ingredients:](\"https:\/\/www.fabfood4all.co.uk\/wp-content\/uploads\/2026\/07\/Seedless-Blackberry-Raspberry-Jam-3-lr-ig-sq-972x1024.jpg\")
<\/figure>\n<\/div>\n\n
Equipment<\/h3>\n
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Instructions<\/h3>\n
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![\"Wild](\"https:\/\/www.fabfood4all.co.uk\/wp-content\/uploads\/2026\/07\/Seedless-Blackberry-Raspberry-Jam-4a-lr.jpg\")
<\/li>\n![\"Blackberries](\"https:\/\/www.fabfood4all.co.uk\/wp-content\/uploads\/2026\/07\/Seedless-Blackberry-Raspberry-Jam-5-lr.jpg\")
<\/li>\n![\"Cooked](\"https:\/\/www.fabfood4all.co.uk\/wp-content\/uploads\/2026\/07\/Seedless-Blackberry-Raspberry-Jam-7-lr.jpg\")
![\"Blackberry](\"https:\/\/www.fabfood4all.co.uk\/wp-content\/uploads\/2026\/07\/Seedless-Blackberry-Raspberry-Jam-8-lr.jpg\")
<\/li>\n![\"Cooked](\"https:\/\/www.fabfood4all.co.uk\/wp-content\/uploads\/2026\/07\/Seedless-Blackberry-Raspberry-Jam-9-lr.jpg\")
![\"Stainless](\"https:\/\/www.fabfood4all.co.uk\/wp-content\/uploads\/2026\/07\/Seedless-Blackberry-Raspberry-Jam-10-lr.jpg\")
<\/li>\n![\"Easy](\"https:\/\/www.fabfood4all.co.uk\/wp-content\/uploads\/2026\/07\/Seedless-Blackberry-Raspberry-Jam-11-lr.jpg\")
<\/li>\n![\"Seedless](\"https:\/\/www.fabfood4all.co.uk\/wp-content\/uploads\/2026\/07\/Seedless-Blackberry-Raspberry-Jam-13-lr.jpg\")
<\/li>\n![\"A](\"https:\/\/www.fabfood4all.co.uk\/wp-content\/uploads\/2026\/07\/Seedless-Blackberry-Raspberry-Jam-16-lr.jpg\")
<\/li>\n![\"Chilled](\"https:\/\/www.fabfood4all.co.uk\/wp-content\/uploads\/2026\/07\/Seedless-Blackberry-Raspberry-Jam-17-lr.jpg\")
<\/li>\n![\"Stirring](\"https:\/\/www.fabfood4all.co.uk\/wp-content\/uploads\/2026\/07\/Seedless-Blackberry-Raspberry-Jam-18a-lr.jpg\")
<\/li>\n![\"Potting](\"https:\/\/www.fabfood4all.co.uk\/wp-content\/uploads\/2026\/07\/Seedless-Blackberry-Raspberry-Jam-19-lr.jpg\")
<\/li>\n![\"Sealed](\"https:\/\/www.fabfood4all.co.uk\/wp-content\/uploads\/2026\/07\/Seedless-Blackberry-Raspberry-Jam-20a-lr.jpg\")
<\/li>\n<\/ol>\nRecipe Testing Notes<\/h2>\n
![\"A](\"https:\/\/www.fabfood4all.co.uk\/wp-content\/uploads\/2026\/07\/Seedless-Blackberry-Raspberry-Jam-3-lrb-856x1024.jpg\")
<\/figure>\n<\/div>\nSubstitutions and Variations<\/h2>\n
Storing Seedless Blackberry & Raspberry Jam\u00a0<\/h2>\n
What to Serve with Seedless Blackberry & Raspberry Jam<\/h2>\n
More Blackberry & Raspberry Preserve Recipes<\/h2>\n
![\"Easy](\"https:\/\/www.fabfood4all.co.uk\/wp-content\/uploads\/2021\/08\/Seedless-Blackberry-Jam-15-lr1-1024x1024.jpg\")
Seedless Blackberry & Raspberry Jam FAQs<\/h2>\n
![\"Blackberry](\"https:\/\/www.fabfood4all.co.uk\/wp-content\/uploads\/2026\/07\/Seedless-Blackberry-Raspberry-Jam-23-lr-1024x682.jpg\")
<\/figure>\nConclusion<\/h2>\n
<\/figure>\n<\/div>\nSeedless Blackberry & Raspberry Jam \u2013 1st Prize Winner<\/h2>\n