Blackberry Jelly - cooking recipe

Ingredients

3 qt. ripe blackberries
7 1/2 cups sugar
1 6 oz. bottle of liquid fruit pectin

Preparation

Sort and wash the berries, remove stems and caps.
Crush berries to extract 4 cups of juice, combine juice with sugar in a large saucepan and mix well.
Place over high heat and cook, stirring constantly until it comes to a rapid boil.
Boil hard for one minute, again stirring constantly.
Add pectin and bring to a full rolling boil.
Boil one more minute stirring constantly. Remove from heat, skim off the foam with a metal spoon.
Pour jelly quickly into sterilized glasses.
Seal and cool.
Yield about 8 to 9- 1/2 pints.