By Tessie2
5 1/2 cups plum juice
1 package powdered pectin
7 1/2 cups sugar
Combine juice and pectin in a large saucepot. Bring to a boil over high heat. Add sugar, stirring until dissolved. Return to a rolling boil. Boil hard for 1 minute, stirring constantly. Remove from heat. Skim foam if necessary. Ladle hot jelly into hot, sterilized jars, leaving 1/4th inch headspace. Adjust two-piece caps. Process 5 minutes in a boiling water canner.
Yield: about 10 half-pints.