Quantity: An average of 14-1/2 pounds is neeed 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 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. Add fresh hot water, leaving 1-inch headspace.
Adjust lids and process following the recommedations in Table 1 or Table
2 according to the method of canning used.
Table 1. Recommended process time for Mushrooms in a dial-gauge pressure
canner.
Style of Pack: Hot. Jar Size: Half-pints or Pints.
Process Time: 45 minutes.
Canner Pressure (PSI) at Altitudes of 0 - 2,000 ft: 11 lb.
2,001 - 4,000 ft: 12 lb.
4,001 - 6,000 ft: 13 lb.
6,001 - 8,000 ft: 14 lb.
Table 2. Recommended process time for Mushrooms in a weighted-gauge
pressure canner.
Style of Pack: Hot. Jar Size: Half-pints or Pints.
Process Time: 45 minutes.
Canner Pressure (PSI) at Altitudes of 0 - 1,000 ft: 10 lb.
Above 1,000 ft: 15 lb.
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* USDA Agriculture Information Bulletin No. 539 (rev. 1994)
* Meal-Master format courtesy of Karen Mintzias
