Cranberry Blueberry Jam

On Monday night, I did my final live demo of the year. I talked about fruit pastes, answered questions, and made a batch of cranberry blueberry jam using fresh cranberries and frozen wild blueberries (though regular frozen blueberries would also work).

This recipe uses the same technique as the raspberry version I posted over the weekend. You combine frozen fruit with fresh cranberries to get a preserve that is flavorful, not-too-sweet, and perfectly set (cranberries are magical in the setting ability).

If you want to watch me making this jam, you can see the full video after the jump (or, if you navigated directly to this post, you should see the player below).

Cranberry Blueberry Jam

Yield: makes 7 half pints


  • 3 pounds frozen blueberries
  • 12 ounces fresh cranberries
  • 2 1/4 cups sugar


  1. Prepare a boiling water bath canner and enough jars to hold 7 half pints of product.
  2. Combine the berries and sugar in a large, non-reactive pot. Stir to combine. Let sit for 30 minutes or so, until the berries are mostly defrosted.
  3. Place the pot on the stove over high heat and bring to a boil. Reduce the heat to medium-high and cook, stirring regularly, until the jam thickens. This should take between 20 and 25 minutes. Because of the presence of the cranberries, this jam will pass the sheet test on a spatula.
  4. When the jam is finished, remove the pot from the heat.
  5. Funnel the jam into the prepared jars, leaving 1/2 inch headspace.
  6. Wipe the rims, apply the lids and rings, and process in a boiling water bath canner for 10 minutes.
  7. When the time is up, remove the jars and set them on a folded kitchen towel to cool. When the jars have cooled enough that you can comfortable handle them, check the seals. Sealed jars can be stored at room temperature for up to a year. Any unsealed jars should be refrigerated and used promptly.

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10 Responses to Cranberry Blueberry Jam

  1. 1
    Rachel says:

    Oh, bummer! I haven’t followed you on Facebook, so I’ve been looking for updates on fruit pastes on the website and not seen any. I’m leaving on vacation (in less than an hour, ha, priorities), and I had hoped to be able to do the fruit pastes prior to my through-the-rest-of-the-year vacation. Maybe I can still count as having successfully completed the entire year-long-challenge if I complete it in early January. 🙂

    Have a lovely holiday season!

    Formerly casulamellita, with revamped site

  2. 2
    Erica says:

    Thank you so much for these video demos. I have enjoyed watching them so much this year and I love the little tips I’ve picked up that have translated into more comfort as I can. I hope once you’re able to get through the big push with your book, you’re able to do the videos again next year. Happy holidays!

  3. 3
    Annie says:

    Can you use frozen cranberries? Thanks!

  4. 4
    Marissa says:

    Tried this today! Wow!! So good!! Set up beautifully, will
    Make this again really soon!

  5. 5
    Abby says:

    I made this and the raspberry/cranberry jam a couple days ago to add to Christmas gifts. So good!! I added some fresh ginger and crystallized ginger (like your fresh blueberry jam from Preserving by the Pint) and boy is it delicious! So glad I gave this a whirl and might just have to make another batch to keep for us to eat.

  6. 6
    Elisha says:

    Hello! Could this recipe be halved fro a micro batch? It looks delicious but I’m the only cranberry lover in this house. Thanks a bunch!

  7. 7
    Janet Hurlbrink says:

    This was super easy. Made great gifts for the holidays. Thanks for posting Marisa.

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