Michigan State University Extension
Preserving Food Safely - 01600267
10/13/97

### POTATOES, WHITE--CUBED OR WHOLE QUANTITY: An average of 35 pounds is needed per canner load of 7 quarts; an average of 22-1/2 pounds is needed per

    canner
    load of 9 pints.  A bag weighs 50 pounds and yields 8

    to
    12 quarts--an average of 5 pounds per quart.

        QUALITY:   Select small to medium-size mature  potatoes

    of
     ideal  quality  for  cooking.  Tubers  stored  below  45

    degrees
      Fahrenheit  may   discolor  when  canned.   Choose

    potatoes
    1 to  2 inches in diameter if they are to be packed

    whole.

        PROCEDURE:  Wash and peel potatoes.  Place in  ascorbic

    acid
     solution  (use  one  teaspoon   of  powdered  ascorbic

    acid
    per gallon of  cold  water) to  prevent  darkening.  If

    desired,
    cut  into  1/2-inch  cubes.  Drain.  Cook 2 minutes

    in
    boiling water and drain again.  For  whole potatoes, boil

    10
    minutes and drain.  Add 1  teaspoon of  salt per quart to

    the
    jar, if  desired.   Fill   hot  jars  with  hot potatoes

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

    lids
    and process.

           RECOMMENDED PROCESS TIMES FOR WHITE POTATOES

                 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
      Pints  35 min.  11 lb.    12 lb.    13 lb.    14 lb.

    Hot
      Quarts 40       11        12        13        14

           RECOMMENDED PROCESS TIMES FOR WHITE POTATOES

             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
         Pints    35 min.     10 lb.               15 lb.

    Hot
         Quarts   40          10                   15

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