Michigan State University Extension
Preserving Food Safely - 01600287
10/13/97

### MUSHROOMS--WHOLE OR SLICED

        QUANTITY:   An average of 14-1/2 pounds is  needed  per

    canner
    load of 9 pints; an average of 7-1/2 pounds is needed

    per
    canner load of 9 half-pints--an average of 2 pounds  per

    pint.

        QUALITY:   Select  only  brightly  colored,  small   to

    medium-size
    domestic mushrooms with short stems, tight veils

    (unopened
    caps)  and no discoloration.  CAUTION:  DO NOT CAN

    WILD
    MUSHROOMS.

       PROCEDURE:   Trim stems and discolored parts.   Soak  in

    cold
     water  for 10 minutes to remove dirt.  Wash  in  clean

    water.
     Leave small mushrooms whole, cut large ones.   Cover

    with
    water in a saucepan and boil 5 minutes.  Fill hot  jars

    with
     hot  mushrooms,  leaving  1-inch headspace.   Add  1/2

    teaspoon
     of  salt  per  pint  to the  jar, if desired.  For

    better
    color, add 1/8 teaspoon of ascorbic acid powder, or a

    500-milligram
     tablet  of  vitamin  C to each pint jar.  Add

    fresh
    hot  water,  leaving   1-inch  headspace.  Adjust lids

    and
    process.

           RECOMMENDED PROCESS TIMES FOR MUSHROOOMS IN A

                  DIAL-GAUGE PRESSURE CANNER

                        Canner Pressure (PSI) at Altitudes of

    Style

    of
       Jar       Process  0-       2001-    4001-    6001-

    Pack
     Size      Time     2000 ft. 4000 ft. 6000 ft. 8000 ft.

    Hot
    Half-Pints  45 min.  11 lb.   12 lb.   13 lb.   14 lb.

    Hot
      Pints     45       11       12       13       14

            RECOMMENDED PROCESS TIMES FOR MUSHROOMS IN A

                  WEIGHTED-GAUGE PRESSURE CANNER

                         Canner Pressure (PSI) at Altitudes of

    Style

    of
          Jar      Process      0-                   Above

    Pack
        Size     Time         1000 ft.             1000 ft.

    Hot
       Half-Pints 45 min.      10 lb.               15 lb.

    Hot
         Pints    45           10                   15

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