Ingredients:

  • 4 cups (600g) fresh blackberries
  • 2 tbsp (30ml) fresh lemon juice
  • 1 pkg (1.75 oz / 50g) low-sugar pectin
  • 2 cups (400g) granulated cane sugar

Instructions:

  1. Place the rinsed blackberries in a heavy-bottomed pot.
  2. Use a potato masher to crush the berries until you reach your preferred consistency.
  3. Stir in the lemon juice to stabilize the color and prep the pectin.
  4. Whisk the low-sugar pectin into the mashed fruit over medium heat.
  5. Increase heat to high and bring the mixture to a full rolling boil, stirring constantly to prevent the bottom from sticking.
  6. Gradually stir in the granulated cane sugar and return the mixture to a rolling boil.
  7. Continue boiling hard for exactly 1 minute, then remove from heat immediately.
  8. Skim off any foam from the surface with a spoon for a clear finish.
  9. Ladle the hot jam into sterilized jars, leaving 1/4 inch (6mm) of headspace.
  10. Wipe the rims clean, apply lids, and tighten rings to fingertip tight.
  11. Process in a boiling water bath for 10 minutes.