6 c. crushed blackberries
1 pkg. powdered pectin
8 1/2 c. sugar

Put measured crushed berries in a pot. Add pectin and stir well. Place on high heat and stir constantly bringing quickly to a full boil with bubbles over the entire surface. Add sugar, continue stirring and heat again to a full bubbling boil. Boil hard for 1 minute, stirring constantly. Remove from heat and skim.

Fill and seal containers. Process 5 minutes in boiling water bath. Makes 11 to 12 half pint jars.