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Blackberry Jam

Contributed by : Jane Berthiaume
jane-berthiaume-20220708205352
Canadian Recipes : Canning/ Preserving

On Jane’s farm, the berry patch is a rainbow of flavors, but nothing grows with quite the same wild enthusiasm as her blackberries. Every summer, the canes bend under the weight of plump, sun-warmed fruit, their deep purple juice staining fingers and smiles alike.

This jam is Jane’s pride—a jewel-toned spread that bursts with sweet-tart flavor. But here’s her little secret: while it’s delicious on toast, it’s downright irresistible when spooned over a wheel of warm, gooey brie. Pair it with a crusty baguette, and you’ve got an appetizer that will have guests hovering by the serving table until the last drop is gone.

Best of all? It’s simple enough to whip up in an afternoon, yet special enough to make you the hero of your next gathering. Just one bite, and you’ll see why Jane’s blackberry jam isn’t just a recipe—it’s a celebration in a jar.

Total Time

1 hr 15 mins

Prepare Time

45 mins

Cook Time

20-30 mins

Recipe Servings

6 250ml Jars

Ingredients for
Blackberry Jam

  • 9 Cups Blackberries (5 cups pureed) (fresh or frozen)
  • 5 Cups Sugar (or 2lbs 3.2ozs)
  • 3 Tbsps Lemon Juice

How to Make
Blackberry Jam

  1. Wash and drain the blackberries.  Run them through a food mill to remove the seeds.  Reserve the blackberry puree (you should have about 5 cups) and discard the seeds (I give them to our chickens).

  2. Place the blackberry puree in a large pot and add the sugar and lemon juice.

Bring the mixture to a boil, stirring regularly, until the jam reaches 220 degrees F.  I use an instant read thermometer.

  3. Ladle the jam into sterilized jars leaving 1/4 inch headspace and wipe the rims clean before sealing.

If you're not sealing the jars the jam will keep in the fridge for several months.

If you're using the water bath canning method process the jars for 5 minutes.  Carefully remove the jars, let them sit undisturbed for 24 hours, then store in a dark cool place.  Jam will keep for up to a year.  

  4. Makes about 6, 250ml jars.