My Grandmother's Plum Jam Recipe
My nana has been making plum jam for my family for as long as I can remember, and to this day it remains my favourite jam above all others. I asked her for the recipe not long ago, so she wrote it out and sent it to me in the post. I was surprised at how simple it was, but also how delicious it remains. I made several jars and handed them out to friends and family for their feedback. I have received glowing compliments all round (and a suggestion that I make jam on a weekly basis), so it must be good!
The colour of the jam depends on the type of plums that you use. My recommendation is to get hold of some British Victoria plums where possible. They are slightly egg-shaped and have yellow flesh with red or mottled skin. Below this recipe, I have included advice on sterilising jars and some other useful tips you might find useful. Enjoy!
- 1.5Kg plums
- 1.5Kg granulated sugar
- 250ml water
- Wash plums. Halve them, remove stalks and stones.
- Put the plums into a large-capacity pot with the water. (Try to avoid aluminium pots where possible. Aluminium coated in Teflon should be fine.)
- Cook slowly until all of the fruit has broken down into a paste-like consistency. The time for this will vary depending on how ripe and firm your plums are (expect between 20-40 minutes).
- Add the sugar and stir over a low heat until the sugar has dissolved completely.
- Bring to the boil, then boil rapidly.
- After 10 minutes, test for set. Do this by placing a plate in the freezer before starting. When you're ready for the test, take the plate out of the freezer and take the jam off the hob. Use a spoon to blob a little bit of jam onto the plate. Wait a few seconds and push it with your finger. If the jam is sticky and forms a skin, it is set. If it is runny, return the pan to the heat for another 5 minutes and test again.
- Take the jam off the heat and use a wide-mouth funnel to pour your jam into sterilised jars (while the jars are still warm to eliminate the chances of the glass cracking).
- Fill the jars almost up to the brim, seal with lids immediately and turn upside down for an hour (or until cool).
- Sealed jars may be stored at room temperature. Once you open a jar, however, it should be stored in the fridge.
Sterilising Jars and Extra Tips
It is very important to sterilise your jam jars before use. This ensures that your jam stays fresh for as long as possible.
I sterilise my jam jars by first washing them (and their lids) in very hot soapy water, then rinsing with boiling water. I then place them upside-down on a clean baking sheet (covered in greaseproof paper) and put them in a preheated oven at 120C (250F). The jars stay in the oven like that until I am ready to put the jam into them. I then take out the jars one by one (wearing oven gloves) as I need them and fill them up. I use oven gloves to put the lid on the jar as soon as it is full and then place it upside down on a towel, before taking out the next jar. The jars I use are very reliable, and I love the twist lids. I've even been told that they look professional enough to sell, so I recommend them.
I don't have a wide-mouthed funnel, so instead, I use a milk jug with the bottom cut off. I invert it over the jar, holding on to the handle, and pour into the missing 'bottom', the jam then comes out of the mouth of the jug into the jars.
I also find it very helpful to put down a towel throughout this process for any little stray blobs. Then I can throw it in the wash and avoid spending time scrubbing at my countertops.
If you have any of your own jam making tips please do share them below! If you try this recipe, comment and let me know how it goes! Thank you for reading.
These Are The Jars I Use, and I Love Them
These jars are the perfect size for jam, and their lovely shape makes them really good for gifts. They can handle the heat just fine and have never broke on me. They have a great aesthetic and when paired with a nice ribbon or label, they look very professional. I highly recommend.
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