Raspberry and Strawberry Jam

This time of year, I have a brief wonderful moment when my all year round hoarding of jam jars, stops becoming a nuisance and starts becoming useful. We don’t eat huge amounts of jam, but there are some things that I can’t let go past without marking their season with a pot of something home-made – whether it’s rose petals for jam, chillies for jams, chutneys and pickles, lemons for curd, raisins for mincemeat or berries to make some lovely soft set jam. There’s something wonderful about opening a jar of rose petal jam in the depths of winter and remembering the fun we had running around in the sun looking for gorgeously scented dog rose petals or raspberry jam and remembering collecting them in the summer holidays.

Dog Roses. The petals are wonderfully scented and edible.
Dog Roses. The petals are wonderfully scented and edible.

This jam recipe is very forgiving and very, very simple to do. You can make it with any berries. If your strawberries are large, just make sure that you cut them up so that they’re roughly the same size as the berries that you’re using. You can halve the quantities, or even quarter them to make just one or two jars. This quantity made 5 jars of varying sizes.

Top tip: if any hot jam splashes on to you, don’t try to lick it off quickly. This will mean that you have scalding hot sugar sticking to your tongue or mouth. Wipe it off with a cloth or with cold water.

If you want to keep your jam any length of time, you must follow the simple instructions to sterilise your jars. Even if you think that they’re clean, they may harbour some bugs which will quickly make your precious jam go mouldy. If, on the other hand you’re thinking that  you’ll use the jam withing a couple of weeks, you can skip the sterilising process and just make sure that your jars are as clean as you can make them.

How to prepare your jam jars:

Soak the jars overnight in hot, soapy water to get rid of any remaining labels and glue. In the morning give them a good scrub inside and out. Do the same to the screw tops. Re-fill the bowl with more hot soapy water and wash them all again. Rinse the jars and lids in more hot water and leave them upside down on the draining board until they’ve dried a little. Don’t wipe them inside or out with anything. Leave them there until you’re ready to put the hot jam into them.

Jam Recipe

1kg of fruit – raspberries, strawberries, blackberries, blueberries, blackcurrants etc in any proportions (an extra 100g or so won’t hurt)

1kg of jam sugar (you’ll find this by the normal sugar. It has pectin added to it, to make the jam set – this takes all of the guess work out of jam making!)

1-2 tblsp lemon juice (from a bottle is fine)

If you are making a jam with a lot of raspberries or blackberries, you might like to do what I do to get rid of a few of the pips. Put half of the raspberries and/or blackberries into a saucepan with 1tblsp of lemon juice. Turn the heat underneath it and mash the fruit with a potato masher. Bring to the boil and fast simmer for 5 minutes. Strain the cooked fruit into a sieve, over a bowl and then push the cooked fruit through the sieve until all that remains in the sieve is pips and a bit of mushed up fruit. Get it as dry as you can. Throw away the pips in the sieve and put the juice into a large saucepan with the rest of the un-cooked fruit, sugar and remaining lemon juice.

Put two small saucers into the freezer. Put the oven onto its lowest setting.

Bring the fruit to the boil and continue to boil fiercely for around 10 minutes.


When the jam has been cooking for 5 minutes, put the clean jam jars upside down directly onto the racks in the oven. Leave them in there for 5 minutes.

Gently stir every so often to check nothing is sticking to the bottom. Take one of the saucers out of the freezer and carefully pour a desert spoon of the hot jam onto the saucer. Leave it for 30 seconds and then push it with your finger. If the jam wrinkles easily, it means that it will set when it’s cool in the jar. If it doesn’t wrinkle easily, leave the jam to cook for another couple of minutes and try the saucer test again.

Turn the heat off and leave the jam to cool for 5 minutes. Take the jam jars out of the oven and turn it off. In the cooling oven, put the jam jar lids and leave them there until you’ve put the jam in the jars.

Very, very carefully (hot jam is so dangerous) using a small non plastic jug or teacup, pour the hot jam into the hot jars (hot jam in cold jars will make them break) until it’s nicely filled with about a 1-2cm gap from the top. Continue until all of the jars are full. Using a tea cloth to hold the jar, screw on the warm lids firmly and leave them to cool completely.

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