The Cottage Smallholder


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Two wild plum jam recipes

Photo of a windfall of wild plums under the tree

Photo: Wild plums make delicious jam

Here are two of our wild plum jam recipes. Wild plums taste quite tart, similar to damsons. They are excellent for jam and jelly and both are not too sweet.

The following recipes describe two methods for making wild plum jam.

If your plums are barely ripe (still pretty firm) go for the first one, if they are soft and ripe go for the second. The barely ripe recipe will have a sharper taste.

Barely ripe wild plum jam recipe:

Ingredients:
900g/2lb of barely ripe wild plums
900g/2lb of preserving sugar

Method:

  1. Wash the plums and discard any damaged fruit.
  2. Slit the plums with a knife. This will allow the stones to float to the surface during cooking so that they can be easily removed.
  3. Place plums in a non metallic bowl, sprinkle over sugar and mix to coat the plums.
  4. Cover with a clean tea cloth and leave overnight.
  5. The following day put plums and sugar into a large heavy bottomed saucepan (or preserving pan) and heat very gently until the sugar has dissolved.
  6. Bring the jam to the boil and continue to boil very rapidly for about 8-10 minutes until the jam reaches setting point. At this stage carefully remove the stones as they float up to the surface, with a slotted spoon. (What is setting point? See tricks and tips below).
  7. When the jam has set, carefully pour into warm, sterilised jars, using a ladle or small jug (How to sterilise jars? See tricks and tips below)
  8. Cover the jars with tight fitting screw-top lids, or waxed disks and cellophane pot covers (waxed disks, wax facing upwards and plastic covers secured with plastic bands).
  9. when cold and store in a cool, dark place, away from damp.

Ripe wild plum jam recipe:
Ingredients:
900g/2lb of ripe wild plums
900g/2lb of white granulated sugar – if you prefer a more tart jam cut the sugar by a quarter – I prefer less sugar myself
½ pint/275ml of water
Method:

    1. Wash the plums and discard any damaged fruit.
    2. Put the plums and water into a large heavy bottomed saucepan (or preserving pan) and simmer gently until the skins split and they are soft.
    3. Meanwhile, warm the sugar in a low oven for ten minutes and add to the fruit.
    4. Stir gently over a low heat until you are sure that all the sugar crystals have dissolved.
    5. Turn up the heat to its highest setting and, stirring frequently, let the fruit boil rapidly for 8-10 minutes (this is called a rolling boil).
    6. Remove the stones with a slotted spoon during the boiling process.
    7. Test for set (What is set/ setting point? See tricks and tips below).
    8. If the jam has not set, continue to boil rapidly and test at five minute intervals.
    9. When the jam has set carefully pour into warm, sterilised jars, using a ladle or small jug. (How to sterilise jars? See tricks and tips below)
    10. Cover the jars with tight fitting screw-top lids, or waxed disks and cellophane pot covers (waxed disks, wax facing upwards and plastic covers secured with plastic bands).
    11. Label when cold and store in a cool, dark place, away from damp.

Tips and tricks:
Jam “set” or “setting point”:
Getting the right set can be tricky. I have tried using a jam thermometer but find it easier to use the following method. Before you start to make the jam, put a couple of plates in the fridge so that the warm jam can be drizzled onto a cold plate (when we make jam we often forget to return the plate to the fridge between tests, using two plates means that you have a spare cold plate). Return the plate to the fridge to cool for approx two minutes. It has set when you run your finger through it and leave a crinkly track mark. If after two minutes the cooled jam is too liquid, continue to boil the jam, testing it every few minutes until you have the right set. The jam is far more delicious if it is slightly runny.

Sterilising the jars:
We collect jars all year round for our jelly, chutney and jam making sessions. I try to soak off labels and store the clean jars and metal plastic coated screw-top lids in an accessible place. The sterilising method that we used is simple. Just before making the jam, I quickly wash and rinse the jars and place them upside down in a cold oven. Set the temperature to 160c/140c for fan assisted. When the oven has reached the right temperature I turn off the heat. The jars will stay warm for quite a while. I only use plastic lined lids for preserves as the all-metal lids can go rusty. I boil these for five minutes in water to sterilise them. If I use Le Parfait jars, I do the same with the rubber rings.
Damson Jam: The recipes above work well with damsons.


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122 Comments

  1. Fiona Nevile

    Hi Sizzler

    I reckon that this will make 4-5 1lb jars.

  2. Sizzler

    Hi

    I was wondering roughly how many jars your recipe will make. Want to make sure I have enough before I try.

    Thanks

  3. gaylynn

    thank u so much for your website. we recently purchased a home in northern california and found a cherry plum tree. i have changed its name to a chlum tree. had no idea really what kind of tree it was but have been enjoying the fruit considerably. it has taken me days to find a website that has exact ingredients on how to make jam with this fruit and now i know what i will be doing this week. do you have any other recipes of things i can make with this cherry plum fruit

  4. Chris & Dean

    We have made the plum jam recipe 3 times, this last week, and it is beautiful, very easy to make, and we have given some jars to friends and family, and they have loved it. Thank you for a great recipe.

  5. Fiona Nevile

    Hi Lynne

    Thanks for taking the time to drop by and correct my mistake. Much appreciated.

  6. Lynn from USA

    Just wanted to let you know so you could correct this. Here in the USA (America) we call this Jam and not Jelly.
    What we call Jam has pieces of the fruit in it just like this recipe.
    What we call Jelly is where the fruit is strained after cooking and all pieces of fruit is removed, you make the jelly with Only the juice from the fruit. Therefore you end up with Jelly with no pieces of fruit in it.
    Just thought I would let you know since you have this incorrect on this page. Don’t want to confuse anyone when looking for a jelly recipe since this is in fact Jam.

  7. Fiona Nevile

    Hi Bizzylizzy,

    I would move all the preserves out of the cellar immediately.

    If you want to save the jam you can’t open the lids, remove the mould and pop the lids back on. As a) The spores are tiny and you might miss some and b) you will break the seal on the jars.

    Even if you remove the mould and a layer of jam underneath there will still be teeny spores around the top of the jar that you can’t see. You could try, as an experiment, bring the jam to the boil (minus mould) and rebottling in warm sterilised jars and lids. Reboiled jam looses a lot of its freshness.

    So sorry to be a harbinger of doom.

  8. Bizzylizzy

    I’m sure you must be right, it is stored in my cellar which is cold and very damp. My chutney and mincemeat is fine though.

    Do you think it will be alright to remove the mould and screw the jars up again then rehouse them?

  9. Fiona Nevile

    Hi Bizzylizzy,

    I’ve just answered the comment that you left at 2 o’clock. I think that this is a storage problem – too cold and damp. Penicillin will develop in these conditions. It is harmless!

    If you used my recipes all my jam is fine and the jam I made a year ago is fine too.

    When I started making jam a few years ago I stored it in a tin trunk in an insulated shed. The conditions were too cold and damp and penicillin developed within a few months.

  10. Bizzylizzy

    Help! I have just opened my Damson Jam which has greenmould on top my Blackberry and Apple is the same. I removed the mould and had it this morning on toast and am still here at 3 p.m. to tell the tale. The jam jars were sterilised and it tasted OK but can anyone tell me what went wrong?

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