Grape Jelly - cooking recipe

Ingredients

6 1/2 c. sugar
2 1/2 c. water
1 bottle Certo or 2 envelopes
3 (6 oz.) cans grape juice or 2 1/2 c. frozen concentrate, thawed

Preparation

Stir sugar into water.
Place on high heat, stirring constantly.
Bring to a full rolling boil that can't be stirred down.
Boil hard 1 minute.
Remove from heat.
Stir in Certo.
(Be sure to use Certo; do not substitute dry pectin!)
Add grape juice. Mix well.
If not thick enough, pour in a little more Certo.
Pour into 8 to 12 ounce glass jars (6 ounce or larger).