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    Ingredient guide · Ingredient reference

    Pressure-canning mushrooms: follow the tested domestic-mushroom method

    NCHFP provides a hot-pack pressure-canning process for suitable domestic mushrooms in half-pint or pint jars. It specifically excludes wild mushrooms; a boiling-water bath is not a substitute.

    Read the evidence ↓

    Supplement Science Insights Editorial Team

    Published September 23, 2026

    Match the food and jar size to the published process

    Use the domestic mushrooms described in the NCHFP instructions: small to medium specimens with unopened caps and appropriate condition. Do not extend the method to wild mushrooms, larger jars or an improvised mushroom mixture. Read the linked pressure-canner operating guidance before starting; this article explains key checks rather than replacing those instructions. [1]

    Prepare and hot-pack as directed

    The published method trims stems and discolored portions, soaks the mushrooms in cold water for 10 minutes to loosen dirt, then washes them. Small mushrooms can stay whole and large ones are cut. Cover with water and boil for 5 minutes before filling hot jars with mushrooms and fresh hot water, leaving 1 inch of headspace. Salt is optional. Use the complete source method for lid handling and canner operation. [1]

    Pressure depends on the gauge and elevation

    The processing time is 45 minutes for the specified half-pint or pint hot pack. For a dial gauge, NCHFP lists 11 psi at 0–2,000 feet, 12 psi at 2,001–4,000, 13 psi at 4,001–6,000 and 14 psi at 6,001–8,000. For a weighted gauge it lists 10 psi at 0–1,000 feet and 15 psi above 1,000 feet. Do not interchange the gauge tables or invent a setting outside the published range. [1]

    Check the whole process before counting minutes

    Imagine a home is at 3,000 feet. A dial-gauge canner uses the source’s 12 psi setting; a weighted-gauge canner uses 15 psi. Both use the specified 45-minute process, after the canner has been vented and reached the required pressure according to the operating instructions. A sealed lid alone does not establish safe processing. [1]

    Hypothetical example — apply a kitchen measurement or handling distinction
    ExampleInterpretation
    3,000 ft, dial gauge12 psi for the stated 45-minute process
    3,000 ft, weighted gauge15 psi for the stated 45-minute process
    Wild mushrooms or quart jarsNot covered by this method
    Pressure-canning mushrooms: follow the tested domestic-mushroom method — original article outline diagram
    Original editorial diagram of this article’s sections; no product photograph or clinical finding is depicted.

    Sources for this article

    1. Mushrooms – Whole or Sliced - National Center for Home Food Preservation
      Source consulted: 2026-09-20. This is a reference resource, not a claim that we conducted the studies or tested a product.