Homemade oncord Grape Jam - 8 cups Concord grapes 6 cups granulated sugar Juice of half a lemon 1/2 teaspoon unsalted butter recipe at http://www.seriouseats.com/recipes/2011/09/concord-grape-jam-recipe-grape-jelly.html
How to Make Old-Fashioned Jams—Really Simple. Great easy direstions, only thing missing is he says to boil jars to sterilize, but don't boil your lids. You need to get them clean and hot, but boiling lids ruins the seal.
Home canning grape jam recipe is easy. Not jelly,but just as good.