Grapes were on sale this week for 88/lb, so I had to try Canning Granny's grape juice recipe. If this works, I'll try it with blueberries next year as well.
In each quart jar, put 1 cup of grapes and 1/2 cup sugar. Cover with boiled water. Place lids, and swirl each jar to dissolve sugar.
Process in BWB 20 minutes.
Wait 2 months. Strain grapes. Drink juice.