Blueberry Lemon Jam

20130617-080549.jpgBlueberries are awesome little powerhouses of nutrition. High in antioxidants, fiber and vitamins, they are sweet little health heroes. For me, as much as I like blueberries, I tend to like them better when paired with another flavor. Unlike our local blackberries, blueberries are just a bit too sweet for me. When partnered up with a more tart flavor, their sweetness is a bit more in balance. I love the combination of blueberry and lemon (and our blueberry-rhubarb combinations this spring were terrific also). So this weekend, I made a new jam experiment with just blueberry and lemon. The result? I think the blueberries taste far better in this jam than in plain blueberry itself! The lemon and lemon zest really brings out the brightness of the berries. This is a keeper!

One of the wonderful things about making jam with blueberries is that a lot of the work is done for you. Unlike strawberries, which require hulling and chopping, blueberries just need a quick wash and a check for any remaining little stems and you’re ready. Also, blueberries have a lot of natural pectin, so you don’t have to use any pectin at all, unless you’re in a hurry.

This recipe uses two kinds of lemon juice–bottled lemon juice (this is to provide enough acid in the jam that the jam will remain shelf stable) and fresh lemon juice and zest (for fresh lemon flavor). This is one place you want to buy an organic lemon. Actually, any time you are zesting citrus, you want to use an organic or pesticide-free fruit because you are using the part of the fruit that is most exposed to pesticides and toxins.

Blueberry Lemon Jam (makes 5-6 half pints)

  • 8 cups fresh blueberries (preferably pesticide free)
  • 1 1/2 cups sugar
  • 1/4 cup bottled lemon juice**
  • Juice and zest from one organic lemon
  1. Fill a canning pot with water, insert the rack and add 6 half pint canning jars. Heat over high to boiling, then turn off heat and let sit until you are ready.
  2. Wash the blueberries in cool water and pick off any remaining stem pieces.
  3. Put the washed, wet blueberries into a non-reactive stock pot and heat over medium. Mash berries with a potato masher several times while cooking.
  4. When blueberries and juice come to a low boil, add the sugar, lemon juices and zest. Stir well to dissolve the sugar.
  5. Turn heat down a bit and keep blueberries at a low boil, stirring frequently, for about 45 minutes or until the berry mixture gels.
  6. Remove hot jars from the canning pot (carefully!) and set them on a clean tea towel. Put the jar lids into a bowl and pour some of the hot water over them to cover.
  7. Carefully ladle jam into the hot jars, leaving 1/4″ of headspace. Add lids and bands, just tighten bands to finger tightness.
  8. Return the filled jars to the canning pot, cover pot, and heat over high to boiling. Boil for 10 minutes. Turn off heat, remove cover, and let sit for 5 minutes.
  9. Remove jars from the hot water bath and let sit undisturbed for 24 hours. Check seals and store in a cool, dry place for up to 1 year.

**You can use fresh lemon juice, but because bottled juice is more consistent in its acid content, the bottled stuff may be more reliable.

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