How to Keep Your Jam Mold-Free and What to Do If It Gets Moldy

Ways to Prevent Mold in Jam

• To prevent mold growth in jam, ensure that the fruits you use are carefully selected. Choose fresh, blemish-free fruits without any signs of worm damage.

• It’s a good idea to test the syrup's consistency after 24 hours.

• While making jam, using a wooden spoon can help minimize mold formation.

• For jams made with water-rich fruits, store them in the refrigerator.

• Adjust the amount of lemon juice based on the recipe for each jam. For jams made with water-rich or sour fruits, use less lemon juice.

• Jam made from water-rich fruits requires a shorter storage time compared to those made from drier fruits. These jams can be stored for at least 6 months before consumption.

• Allow the jam to cool completely before transferring it into jars.

• The syrup should fully cover the fruit.

• Use jars with airtight lids. After filling the jar with jam, make sure the lid is tightly sealed.

• Ensure the jar is clean, sterilized, and dry.

Solution for Moldy Jam

We’ve discussed the causes of mold and how to prevent it, but even with precautions, your jam may still get moldy. Should it be discarded entirely, or can it still be used?

If the mold is only on the surface, remove the top layer of the jam. Then, boil the remaining jam in a pot to reduce its liquid and thicken it. To eliminate any mold spores, simmer the jam on low heat for 5 minutes, and after removing it from the heat, add 1 tablespoon of lemon juice.

However, if the mold is widespread, it’s best to throw the jam away.