Concord Grape Jelly

• 4 pounds (10 cups) ripe Concord grapes, stemmed
• 1 Granny Smith apple, chopped, with seeds
• 2 1/4 cups sugar

1. Put the grapes and apple in a large pot and add 1/2 cup of water. Bring to a boil, cover and simmer over low heat until very juicy, about 10 minutes. Strain the juice through a fine sieve set over a large bowl.
2. Strain the juice again through several layers of dampened cheesecloth, without pressing or squeezing; you should have 3 cups.
3. In a very large saucepan, boil the grape juice and sugar over moderate heat, stirring, until the jelly falls off a cool spoon in sheets and registers 220u0b0 on an instant-read thermometer, about 18 minutes.
4. Pour the jelly into hot, sterilized canning jars to within 1/4 inch of the rims. Seal. Submerge the jars in a pot of water and boil for 5 minutes. Carefully remove the jars and let cool. Check the jar lids to make sure they've fully sealed; refrigerate any jars with imperfect seals.

grapes, apple, sugar

Taken from www.myrecipes.com/recipe/concord-grape-jelly (may not work)