You are here: Home » Recipes » Blackberry Freezer Jam Blackberry Freezer Jam Recipe by Teresa BlackburnKitchen Tested Yield 56 (2-tablespoon) servings Prep 10 mins Cook 5 mins Savor the taste of fresh blackberries all year with this freezer jam. Mark Boughton Photography / styling by Teresa Blackburn PrintEmail Ingredients 3 cups ripe, fresh blackberries rinsed and drained5 1/4 cups sugar1 box pectin for freezer jam (canning sections of supermarkets)1/2 cup water Instructions Place berries in a large bowl. Add sugar and toss well. Let stand about 15 minutes. Stir often. Combine pectin and water in a small saucepan; stir until pectin dissolves. Place over medium to high heat; bring to a boil and boil 1 minute. Add pectin to berries and stir about 3 minutes. Pour jam mixture into clean canning jars, leaving about ½ inch headspace. Add lids to each. Let stand at room temp 18 to 24 hours and then freeze until ready to use. Makes about 7 cups.