Pulp & juice from 48 oz. blackberries (fresh)
1/4 c. lemon juice
1 pkg. pectin
7 c. sugar

Add fruit pulp, juice and lemon juice in very large saucepan. Add pectin. Stir until all the pectin is thoroughly dissolved. Place pulp on high heat. Stir constantly and bring to a boil. Add sugar and mix. Keep stirring and bring to a boil that can't be stirred down. Boil hard EXACTLY four minutes. (If foaming occurs add 1/4 tablespoon butter now.) Stir constantly while in this stage. Remove from heat. Pour into clean jars. Water bathe 10 minutes.

Makes 10 to 11 (9-1/2 pint) jars.