Step #1 Quantity: An average of 14-1/2 lbs is neeed per canner load of 9 pints; an average of 7-1/2 lbs is needed per canner load of 9 half-pints--an average of 2 lbs per pint.
Step #2 Quality: Select only brightly colored, small to medium-size domestic mushrooms with short stems, tight veils (unopened caps), & no discoloration.
Step #3 Caution: Do not can wild mushrooms.
Step #4 Procedure: Trim stems & discolored parts.
Step #5 Soak in cold water for 10 mins to remove dirt.
Step #6 Wash in clean water.
Step #7 Leave small mushrooms whole; cut large ones.
Step #8 Cover with water in a saucepan & boil 5 mins.
Step #9 Fill jars with hot mushrooms, leaving 1-inch headspace.
Step #10 Add 1/2 tsp of salt per pint to the jar, if desired.
Step #11 For better color, add 1/8 tsp of ascorbic acid powder, or a 500-milligram tablet of vitamin C.
Step #12 Add fresh hot water, leaving 1-inch headspace.
Step #13 Adjust lids & process following the recommedations in Table 1 or Table 2 according to the method of canning used.
Step #14 Table 1.
Step #15 Recommended process time for Mushrooms in a dial-gauge pressure canner.
Step #16 Style of Pack: Hot.
Step #17 Jar Size: Half-pints or Pints.
Step #18 Process Time: 45 mins.
Step #19 Canner Pressure (PSI) at Altitudes of 0 - 2,000 ft: 11 lb.
Step #20 2,001 - 4,000 ft: 12 lb.
Step #21 4,001 - 6,000 ft: 13 lb.
Step #22 6,001 - 8,000 ft: 14 lb.
Step #23 Table 2.
Step #24 Recommended process time for Mushrooms in a weighted-gauge pressure canner.
Step #25 Style of Pack: Hot.
Step #26 Jar Size: Half-pints or Pints.
Step #27 Process Time: 45 mins.
Step #28 Canner Pressure (PSI) at Altitudes of 0 - 1,000 ft: 10 lb.
Step #29 Above 1,000 ft: 15 lb.
Step #30 ======================================================= === USDA Agriculture Information Bulletin No.
Step #31 539 (rev.
Step #32 1994) Meal-Master format courtesy of Karen Mintzias.