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How do I? ...Can Vegetables

Selecting, Preparing and Canning Vegetables

Mushrooms - Whole or Sliced

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.

Please read Using Pressure Canners before beginning. If this is your first time canning, it is recommended that you read Principles of Home Canning.

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.
  Canner Pressure (PSI) at Altitudes of
Style of Pack Jar Size Process Time 0 - 2,000 ft 2,001 - 4,000 ft 4,001 - 6,000 ft 6,001 - 8,000 ft
Hot Half-pints or Pints 45 min 11 lb 12 lb 13 lb 14 lb

Table 2. Recommended process time for Mushrooms in a weighted-gauge pressure canner.
  Canner Pressure (PSI) at Altitudes of
Style of Pack Jar Size Process Time 0 - 1,000 ft Above 1,000 ft
Hot Half-pints or Pints 45 min 10 lb 15 lb


This document was adapted from the "Complete Guide to Home Canning," Agriculture Information Bulletin No. 539, USDA, revised 2009.

Reviewed November 2009.

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