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blackberry jam

Blackberry Jam

A delicous blackberry jam.

Course Breakfast
Cuisine American
Keyword blackberry, blackberry jam, jam
Prep Time 20 minutes
Cook Time 20 minutes
Total Time 1 hour

Ingredients

  • 6 Cups Mashed Fresh Blackberries
  • 6 Cups Sugar

Instructions

  1. Sterilize 8 250ml jars, lids and rims.
  2. Strain or press 2 cups blackberries through a sieve or food mill until all the juice is extracted and the seeds left behind.
  3. Mash the remaining berries with a potato masher.

  4. Add the mashed berries to the juice until measuring 6 cups in total.

  5. Pour into a LARGE saucepan (leaving plenty of room for the mixture to boil).

  6. Stir over a high heat.

  7. Bring to a roiling boil and boil for 3 minutes.
  8. Measure out 6 cups of sugar.
  9. Slowly add all the sugar while stirring constantly.
  10. Bring the mixture back to a rolling boil and continue stirring.
  11. Boil for 3 minutes.
  12. Remove from the heat and whisk for 3 minutes to activate the natural pectin in the berries.

  13. Pour into the prepared (sterilized) jars.

  14. Make sure the rims are clean and then place the hot lid onto the jar and finger tighten the rim.
  15. Return to the canner.
  16. Once all the jars are filled , make sure they are covered with at least an inch of water.
  17. Bring the canner to a boil and boil for 10 minutes.
  18. Remove from the canner and allow to rest 24 hours on a tea towel undisturbed.

Recipe Notes

If any of the jars don't seal, store in the fridge.

When relying on the natural pectin found in the berries, keep each batch between 4 - 6 cups mashed berries, with equal proportions of sugar.