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Low pectin test with blueberries: there is no single jelly mass.
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How to Test for Pectin

Use this reliable pectin test and you can be confident your jam will set perfectly every time.
Prep Time5 mins
Cook Time5 mins


  • 1 tsp cooked fruit
  • 1 tbsp methylated spirits - denatured alcohol


  • Place the teaspoon of cooked fruit in a small glass or cup. Allow to cool.
  • Add the methylated spirits and stir briefly or swirl the glass to mix the contents.
  • Allow to stand.
  • If a jellyfied mass forms, the fruit is high in pectin. Small floating blobs indicates low pectin, and you should consider using jam sugar or adding pectin powder to achieve a good set.
• Please note that the nutrition information provided below is approximate and meant as a guideline only.
• Unless stated otherwise cup conversions have been made with an online tool. For accuracy please check with your favoured conversion tool. We recommend buying inexpensive digital kitchen scales.