This Pioneer Woman Blackberry Freezer Jam Without Pectin is one of the best Blackberry jam recipes ever. This easy homemade no pectin Blackberry Freezer Jam is made only with blackberries (fresh or frozen), sugar, and lemon juice. This is one of the quickest Blackberry Freezer Jam recipes, it takes about 40 minutes to finish cooking and can be stored in the freezer for about a year or in the refrigerator for a couple of weeks. This low-sugar Blackberry Freezer Jam can also be made seedless.