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Strawberry Jam (Low Sugar, No Added Pectin)

strawberry jam on a spoon on a white plate with strawberries in the background

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Strawberry jam made with lemon, fresh strawberries, and sugar.

Ingredients

Units Scale
  • 4 cups mashed strawberries (about 2 pounds)
  • 3 cups sugar
  • 1/4 cup lemon juice

Instructions

  • Mix together strawberries, sugar and lemon juice in a large, heavy bottomed sauce pan.
  • Heat on low, stirring until sugar is dissolved.
  • Increase heat to high and bring to a full, rolling boil. Boil, stirring frequently, until the jam reaches 220F (105C) or passes the gelling test.
  • Pour jam into hot, sterile jars, leaving ¼ inch headspace. Process jars in water bath canner for 10 minutes. (Adjust for altitude if needed.) Remove jars from canner and place on a kitchen towel on the countertop to cool.
  • Check seal after 24 hours. Lids should be clamped down in center and not flex when pushed. Label and date and store in a cool, dry location out of direct sunlight.
  • Alternatively, store in refrigerator and use within 3 weeks.