Michigan State University Extension
Preserving Food Safely - 01600895
10/13/97

### GRAPE-PLUM JELLY

    3-l/2
    lb. ripe plums

    3
    lb. ripe Concord grapes

    1
    cup water

    l/2
    tsp. butter or margarine to reduce foaming (optional)

    8-l/2
    cups sugar

    l
    box (l-3/4 oz.) powdered pectin

        YIELD:  About l0 half-pints

        PROCEDURE:    Wash   and  pit  plums;  do   not   peel.

    Thoroughly
    crush the plums and grapes, one layer at a  time,

    in
     a  saucepan  with water.  Bring to a  boil,  cover,  and

    simmer
     l0  minutes.  Strain juice through a  jelly  bag  or

    double
     layer of cheesecloth.  Measure sugar and set  aside.

    Combine
    6-l/2 cups of juice with butter and pectin in  large

    saucepan.
      Bring  to a hard boil over high  heat,  stirring

    constantly.
      Add  the sugar and return to  a  full  rolling

    boil.
     Boil hard for l minute, stirring constantly.   Remove

    from
     heat,  quickly skim off foam, and  fill  hot,  sterile

    jars,
    (see directions  below  for  sterilizing jars) leaving

    l/4-inch
    headspace.  Adjust lids and process.

        Sterilization of Empty Jars

        To  sterilize  empty  jars, place them  right  side  up

    on
     the rack in a boiling-water canner.  Fill the canner and

    jars
    with hot (not  boiling)  water to 1 inch above the tops

    of
     the  jars.   Boil  10  minutes at altitudes of less than

    1,000
    feet.  At higher elevations,  boil 1 additional minute

    for
    each additional 1,000 feet elevation.   Remove and drain

    hot
    sterilized jars one at a time as filled.

          RECOMMENDED PROCESS TIMES FOR GRAPE-PLUM JELLY

                    IN A BOILING-WATER CANNER

                      Process Times at Altitudes of

    Style

    of
            Jar       0-             1001-           6001-

    Pack
          Size      1000 ft.       6000 ft.        8000 ft.

    Hot
        Half-pints   5 min.         10 min.         15 min.

           or pints

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