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How to make Rhubarb Jam

Rhubarb Jam (without pectin)

Lunch Lady Lou
This is my simple, delicious and 3 ingredient how to make rhubarb jam (without pectin) at home recipe. Are you ready to make your own rhubarb jam at home? Heads up, before we start. Make sure you sterilise all your equipment. Jars, lids, tongs, spatula, funnel. All of it. Read this post on how to sterilise jars in the oven.


  • Chopping board
  • Knife
  • Large bowl
  • A big wide pot
  • Ramekins
  • Jars and lids
  • Tongs
  • Spatula
  • Funnel


  • 800 g rhubarb
  • 150 g raspberries I used frozen and thawed
  • 400 g sugar I used 50/50 caster and rapadura
  • 1 lemon zest and juice
  • 1 tsp vanilla bean


  • Wash your rhubarb really well to remove any dirt. Remove all leaves. Dry well.
    800 g rhubarb
  • Chop rhubarb into 2cm chunks and place in a bowl with thawed raspberries and sugar. Mix well. Leave for 30 minutes to macerate.
    800 g rhubarb, 150 g raspberries, 400 g sugar
  • Grab a wide pot. The wider the better as this helps the jam cook faster.
  • Place rhubarb mix into pot and cook on a low heat to dissolve all sugar. Once sugar has dissolved, turn heat up to medium (if you know your pans are amazing and retain heat well, you might want to do a low/medium heat but you probably know this). Add zest and juice of 1 lemon.
    1 lemon
  • Place a few ramekins in the freezer, this is to test our jam has set later on.
  • Now we watch and wait. The jam will reach a rolling boil, this is what we want. Stir jam regularly so it doesn't burn. We're watching the bubbles change, from a loose fast thin pop, into a thicker slower pop. This is practice. This is getting to know a process and infusing the memory of cooking into your psyche. This presence is how you learn to cook. It's hard to explain in writing, you need to experience it. Once you know, you know.
  • Sterilise jars in oven, including your lids, funnel and spatula. We're working with a lower sugar jam and while it does have sufficient acid in it to keep this jam shelf stable, we're going to be careful anyway.
  • Test your jam. Grab a ramekin. Spoon some jam on it and push your finger through the jam. The jam should part and stay parted with a line through the middle. If the jam runs back straight away, it's not ready. Keep cooking.
  • Once jam is ready, stir through vanilla bean. Then carefully pour your hot jam into your hot sterilised jars. Be careful. Your jars need to be hot, otherwise the glass will crack from the temperature change.
    1 tsp vanilla bean
  • Wipe rims of jars really well and seal with lid. Turn jars upside down and leave on bench overnight. Hot jam in hot jars will heat seal the jar, making it shelf stable (you don't need to keep it in the fridge). If I end up with a half filled jar, I keep this in the fridge just in case.
  • In the morning, you can test one of your jars to make sure it's sealed. You can do this by placing a pen on the top of the lid, if you can see a noticeable curve in the jar lid. They're heat sealed. You can also open the jar and listen for a pop.


Jam making and safety
To effectively and safely store food at room temperature you need a preserver. In this case, we're using lemon and sugar. If you change the ratios of this recipe, there's no guarantee it will be safe to store on the shelf. The same goes for jar that don't have an appropriate heat seal. This is why we check. Always follow a recipe with correct preserving ratios AND always work with the cleanest equipment possible (sterilised).
Keyword food preserving, jam, kitchen staples, pantry staples, preserving, summer
Tried this recipe?Let me know how it was!