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Two jars of homemade low-sugar cherry jam with fresh cherries outdoors

Low-Sugar Cherry Jam

A chunky, no-pectin cherry jam made with sweet cherries, just 300 grams of sugar per kilogram of prepared fruit, and one whole lemon. The cherries cook in their own juice, producing a fruit-forward jam that is darker, softer, and less sweet than traditional cherry jam, with plenty of recognizable fruit pieces.
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Prep Time 45 minutes
Cook Time 45 minutes
Cooling Time 10 hours
Total Time 11 hours 29 minutes
Servings: 1 batch
Course: Preserves
Cuisine: Romanian
Ingredients Method Notes

Ingredients
  

  • 1 kg sweet cherries weighed after pitting
  • 300 g granulated sugar
  • 1 medium lemon peeled, seeded, and cut into small pieces

Method
 

  1. Prepare the cherries: Wash the cherries and remove the stems. Pit them over a bowl or directly over the cooking pot so that none of their juice is lost. Weigh 1 kg of cherries after removing the pits.
  2. Prepare the lemon: Peel the lemon and remove the seeds and as much of the thick white pith as practical. Cut the lemon flesh into small pieces. A little thin membrane around the segments can remain.
  3. Add the sugar: Combine the pitted cherries, chopped lemon, and sugar in a wide, deep pot. Mix thoroughly, cover the pot, and leave the fruit to rest for 2–5 hours, until the sugar begins to dissolve and the cherries release plenty of juice. During very hot weather, place the pot in the refrigerator if leaving it for several hours.
    Pitted sweet cherries mixed with sugar and chopped lemon for low-sugar cherry jam
  4. Bring the jam to a boil: Place the pot over medium-low heat and warm the mixture gradually, stirring occasionally while the remaining sugar dissolves. It should take approximately 10–15 minutes to reach a boil.
  5. Cook the jam: Once the mixture begins boiling, cook for approximately 30 minutes. Skim off the foam as it forms and stir occasionally. As the liquid reduces and the jam thickens, stir more frequently and scrape the bottom carefully to prevent the fruit from catching.
    Low-sugar cherry jam boiling with visible fruit pieces and foam
  6. Check the consistency: The jam is ready when it falls slowly from a spoon and the liquid briefly leaves a visible path when the spoon is drawn across the bottom of the pot. For a plate test, place a small spoonful on a plate, wait for about 1 minute, and push it gently with your finger. It should be thick and spreadable but does not need to wrinkle or form a firm gel.
    Low-sugar cherry jam on a white plate showing its final chunky consistency
  7. Prepare the jars: Remove the finished jam from the heat. Wash and sterilize the jars and prepare the lids, allowing approximately 10–15 minutes. Before filling, check that the jam is still very hot. If it has cooled noticeably, return it briefly to the heat and bring it back to a boil.
  8. Fill the jars: Place the hot jars on a metal tray or folded kitchen towel. Spoon the hot jam into the jars up to the neck, leaving a little empty space at the top. Wipe the rims carefully and close the jars firmly with the prepared lids.
    Hot low-sugar cherry jam filled into jars before wiping the rims and adding lids
  9. Cool the jars: Using my traditional method, turn the sealed jars upside down and leave them to cool slowly at room temperature overnight.
    Jars of low-sugar cherry jam turned upside down to cool overnight
  10. Check and store the jars: The following morning, turn the jars upright and check the seals. If any jam has leaked around a lid, refrigerate that jar and use it first. Wipe the properly sealed jars clean, label them with the name and date, and transfer them to a cool, dark pantry.

Notes

  • The fruit must be weighed after the pits have been removed.
  • Keep all the juice released while pitting the cherries. No water is added to this jam.
  • Do not expect a firm commercial set. This is a low-sugar jam without added pectin, so the finished consistency remains soft and spoonable.
  • The lemon balances the sweetness, supports the fruit’s natural pectin, and helps slow browning.
  • Make the jam in batches of no more than 2 kg of pitted cherries per pot. For a 2 kg batch, use 600 g sugar and 2 medium lemons.
  • My 2 kg batch took approximately 45–50 minutes on the stove in total, including the time needed to reach a boil.
  • Use a wide pot with plenty of extra space because the jam can foam and rise quickly.
  • Stop cooking when the jam is slightly looser than the final consistency you want. It will thicken further as it cools.
  • If the jam becomes too thick while still in the pot, add hot water or cherry juice 1 tablespoon at a time, return it briefly to a simmer, and test again.
  • Refrigerate after opening and always use a clean spoon.
Storage note: This recipe records the traditional method I use at home: hot jam is transferred to freshly sterilized jars, sealed immediately, turned upside down, and left to cool slowly overnight. Current research-based home-canning guidance recommends processing filled jam jars using an appropriate boiling-water method and cooling them upright. Readers who prefer that method should follow a tested process suitable for their jar size and altitude.