3CupsFreshly picked and washed berriesor frozen and thawed
1box of No Sugar PectinNote from Melissa:the only store bought pectin I use is Pomona's Pectin, it's a natural pectin without added sugar or GMO ingredients and allows you to make no sugar added jams and jellies. You won't need to use the whole box when using Pomona's, just follow the instructions that come with it
1/4cuplemon juice if using sweet blackberries
1CupGrape Juice from concentrateYou can use any juice from concentrate you like for different flavor profiles
Wash jars in hot soapy water, rinse right before filling with hot water. Prepare your water bath canner, place rack inside and fill with water so jars are completley covered by at 1 inch. Turn the heat to medium so water is 180 degrees F when you put jars filled with jam in the canner.
You’ll want to use a large stainless or enamelware pot for cooking up your jam, and put it on low heat. Add in your clean/washed berries, I slightly crush mine with a potato masher. Optional.
Turn heat up to medium. Dump in grape juice. If using Pomona's pectin, add 2 teaspoons calcium water and stir until combined.
Add powdered pectin (2 teaspoons pectin powder from Pomona's pectin) then use an immersion blender to make sure pectin is fully dissolved and mixed in with juice and berries. Bring to a boil.
Ladle the jam into jars to 1/4 inch headspace, remove air bubbles and add more jam if needed to stay at the 1/4 inch headspace, make sure jar rims are wiped clean, put lid in place, fasten the ring down and set in the canner rack. Repeat.
Bring water to a full boil in canner and then process for 15 minutes. When my timer goes off, I turn off the burner and remove the lid for 5 minutes or so. Then carefully (with a jar lifter) remove jars and set them on a towel to cool for 24 hours
After 24 hours, check seals, remove bands, wipe down the jars, label lids and put them on the pantry shelf.
*this will yield on average 2 pints (4 cups) of finished jam.