Wash, choose, measure – blueberries
Put in a heavy stainless steel pan. Crush bottom layer. Add 1/2 c water if it doesn’t seem to be enough juice. Cook over moderate heat, simmering until almost tender. Add 3/4 to 1 c sugar (heated) for each cup of blueberries. Stir and cook over low heat until a small amount dropped on a plate stays put. Place in hot sterilized jars. Process for 15 minutes in a boiling water bath.