Blueberry Plum Jam

3 cups of blueberries
1-1/2 cups of peeled, pitted and diced plums
2 Tbsp.  fresh lemon juice
7 cups sugar
1/2 tsp.  butter or margarine (to reduce foam)
2 pouches liquid Fruit Pectin

7 sterilized 8 oz. canning jars, lids and rings

  1. Carefully measure out the sugar and set aside.
  2. Stem and crush blueberries thoroughly, one layer at a time. Measure 1 cup of blueberries at a time and place in a non-reactive cooking pot. Mash blueberries with a potato masher or the back of a wooden spoon. repeat with remaining berries.
  3. Add plums and stir in lemon juice. Turn heat on and bring fruit mixture to a low simmer. Quickly stir sugar into the fruit mixture and bring to a rolling boil.
  4. Stir in pectin. Return to full rolling boil and boil exactly 1 min., stirring constantly. Remove from heat. Skim off any foam with metal spoon.
  5. Carefully ladle jelly into sterilized jars, allowing 1/8 in at the top. Wipe the rims of the jars clean and apply lids. Gently place rings on jars and loosely tighten.
  6. Place jars in canner full of boiling water. Make sure they sitting below 1-2 inches of water. Once the canner returns to a roaring boil, process the cans for 10 minutes.
  7. Remove jars and place on a kitchen towel to cool. Once cool store in a cool dark place for up to 1 year.*
**(NOTE: The lids of the jars MUST BE depressed. If the jars did not “pop,” re-process in the canner for 10 additional minutes or place in the refrigerator and use within 3 weeks.)

3 thoughts on “Blueberry Plum Jam

  1. Pingback: Late Summer Canning | K E R N girl

  2. what is pectin and where do you buy it? I may try to do this, Paige needs to go to a low sugar diet and if we can make jam without for her that would be great!

    • Pectin is a thickener that is often added to jellies and jams. Kraft makes a commercial version called sur•jell that you can purchase in the supermarket. It is usually in either the jelly aisle or the baking aisle. Below is a link to a blueberry recipe using no sugar. If you have freezer room, you can freeze the jelly instead of hot water bathing it. Let me know if you think of any more questions or if you need a personal lesson. More than happy to spread the jelly making love!

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