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Jam: True Blueberry Jam

Source of Recipe

Well Preserved


List of Ingredients

6 cups blueberries
4 cups sugar
1/4 cup lemon juice


Recipe

Prepare preserving jars. In your preserving pot, crush berries thoroughly with potato masher. Add the sugar and lemon juice. Bring to a boil over medium-high heat and boil rapidly, stirring often, for 15-20 minutes. Test for set if desired. Remove from heat. Stir and skim off foam if needed. Pour jam into hot, sterilized jars, leaving 1/2" head space. Wipe rims clean.

Seal according to manufacturer's directions. Process jars in boiling water bath for 10 minutes. Can replace half of blueberries with blackberries; after crushing berries and adding sugar, let stand for 1 hour. Follow directions for blueberry jam but add extra 2 tbl. lemon juice and 2 tsp. finely grated lemon zest. Makes 4-5 8 oz. jars.