• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar
  • Dehydrating
    • Dehydrating FAQ
    • Best Dehydrators
  • Canning
  • Shop

The Purposeful Pantry

menu icon
go to homepage
  • Dehydrating
  • Canning
  • Subscribe
  • You Tube
  • Shop
    • Facebook
    • Instagram
    • Pinterest
  • subscribe
    search icon
    Homepage link
    • Dehydrating
    • Canning
    • Subscribe
    • You Tube
    • Shop
    • Facebook
    • Instagram
    • Pinterest
  • ×

    Home » Food Storage

    Author: Darcy Baldwin • This post may contain affiliate links. As an Amazon Associate I earn from qualifying purchases

    Is Dry Canning Safe?

    Macaroni, Quinoa and Rice inside mason jars being canned in the oven

    Dry canning (aka oven canning) is not a safe nor approved method of food preservation for your pantry staple items and dry foods...and here's why.

    Macaroni, Quinoa and Rice inside mason jars being canned in the oven

    There's a trend to use the oven to 'vacuum seal' jars of dried goods in order to seal them for long-term food storage in the pantry. You might have also heard it called oven canning.

    Storing rice, potato flakes, dried foods, etc. seems much better when using this form of sealing, doesn't it? And it's less fussy than using O2 absorbers or trying to find a vacuum sealer.

    There is also a version of 'oven canning' that is used to replace the pressure or water bath canning process which is also recommended against.

    But we're talking specifically about the dry canning/oven canning method used to mimic vacuum sealing for shelf-stable pantry storage of dry goods.

    Why Dry Canning is Not Safe

    Dry Canning is not an approved or safe method for food preservation for a number of reasons:

    • The jars were not created for dry heat. The jar manufacturers have said that they aren't made for that heat. This dry heat can cause micro-fractures that promote jar breakage. In my recent discussions with Newell Brands (who own both Ball and Bernardin), they recommend not to do this.

      So if you then use your jars for canning, the risk of jar breakage is increased.
    screen shot image of Ball Canning jars mail explaining jars should not be in oven
    • Heat promotes moisture release. Inside of an airtight jar, that moisture doesn't reabsorb evenly, leaving the possibility of moisture pockets that can later form mold.
    • Oven canning actually shortens the shelf-life of rice, beans, dehydrated goods by introducing them to heat, The naturally occurring fats and proteins inside the rice and other dry foods need to be kept at a safe temperature as long as possible as to not promote accelerated rancidity, thus wasting your food if you don't use it quickly enough. Food storage recommendations are dark, cool, dry places. That's not the oven!
    • Condensation caused by the cooling effect inside the jars also becomes problematic, especially in this 'sealed' environment. As anyone who has seen a black mold form on the inside of their jars down the road after dry canning.
    • This introduction of moisture into a low-oxygen environment creates the perfect growing medium for any mold spores that could be on your foods if not properly cleaned.

    An Alternative to Oven Canning

    The seal created by the oven is a thermal seal, not a true vacuum seal. If you've ever left your canning jars in a hot car in the summer and listened to the pings as the pressure inside the jar changes from heat, you'll understand the difference!

    So vacuum sealing with a machine or with O2 absorbers is a preferred method of storing dry goods for long-term storage on your pantry shelves.

    Watch 4 Ways to Vacuum Seal Canning Jars here.

    Yes, it does take an investment to use those two alternatives than to just throw your jars into the oven.

    But remember, in most cases, vacuum sealing is a helpful tool, but not mandatory for storing your foods. As long as you have an airtight seal and are keeping your foods in containers that are appropriately sized for the volume you are storing.

    LEARN MORE: Alternatives to vacuum sealing jars

    Additional Resources:

    • Dry Canning Isn't Canning by the National Center for Home Food Preservation
    • Preserve the Harvest by the Utah State University Extension
    • Canning Jar Safety by the SDSU Extension
    Pin It Image for Pinning to Pinterest
    Macaroni, Quinoa and Rice inside mason jars being canned in the oven
    « 7 Alternatives to Vacuum Sealing Jars
    How to Dehydrate Cherry Tomatoes »
    • Share
    • Email

    Reader Interactions

    Comments

    1. Diane says

      September 23, 2021 at 5:21 pm

      I was hoping that you would say it’s unsafe. Because I love falling you on You Tube. I have just started getting into all of this and I’m glad I found you.

      Reply

    Let me know what you think! Cancel reply

    Your email address will not be published. Required fields are marked *

    Recipe Rating




    Primary Sidebar

    Connect with me!

    Howdy! I'm Darcy! I've spent the last twenty years learning how to stretch our budget to meet the needs of our growing family. I want to help you succeed at it, too!

    More about me →

    NEWEST POSTS

    • 25 Ways to Preserve Zucchini
    • How to Dehydrate Basil
    • DIY Zucchini Chips
    • How to Dehydrate Scallions or Green Onions

    Howdy! I'm Darcy! I've spent the last twenty years learning how to stretch our budget to meet the needs of our growing family. I want to help you succeed at it, too!

    More about me →

    NEWEST POSTS

    • How to Dehydrate Pasta
    • How to Dehydrate Cabbage
    • How to Make and Use Citrus Powder
    • How to Dehydrate Carrot Tops

    Footer

    ^ back to top

    About

    • Privacy Policy
    • Disclaimer
    • Who We Support

    Newsletter

    • Sign Up! for emails and updates

    Contact

    • Contact
    • Pinterest
    • Facebook
    • Youtube

    As an Amazon Associate, I earn from qualifying purchases.

    Copyright © 2022 The Purposeful Pantry by Purposeful Media, LLC