10 Foods You Should Never Can at Home
Using a home canner is a great way to preserve foods in mason jars. Using a home canner can help you save money and become more self-reliant. However, not everything can be canned!
Home canners are great for canning certain vegetables and fruits but are unable to reach the heat required to properly can foods that are too oily, have high fat content, or are too viscous. Commercial canneries also use additives, preservatives and processing equipment that you can’t replicate at home.
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Check out this list of 10 items that you shouldn’t can at home:
Milk
Milk, or items containing milk, aren’t recommended for home-canning. Milk has a low-acid level and supports an environment which fosters botulism growth at room temperature. Many times, the fat in milk can also protect botulism spores during the canning process.
Lard
With the high density and fat content, lard is just not a good item to can. The fatness and density won’t allow the heat of the canning process to penetrate the contents, allowing the food to house spores and other harmful bacteria.
Refried Beans
There are some recipes out there for canning refried beans but they can be dangerous. The thickness of the refried beans is too much for the heat to penetrate the interior of the bottle. You might be better off getting freeze-dried refried beans instead.
Pickled Eggs
Once again, density is a problem with canning pickled eggs. The skin of the egg is a little too much for your home canner to handle.
Butter or Cream
Like milk, butter or cream items, are not recommended for home canning. The amount of heat required for dairy items to be canned correctly would actually make the foods inedible. It’s not recommended that you can any items with dairy at home.
Cornstarch
Lots of families want to can cornstarch to use in future baking projects. However items that contain cornstarch shouldn’t be canned because of their ability to break down acidic food mixtures and interfere with heat-killing pathogens.
Flour
A popular trend is for people to create “cakes in a jar” or other dishes containing flour. Flour products (breads, doughs, etc) are very prone to botulism.
Nuts and Cashews
Most nuts have an oily texture and can lead to botulism. The oily outside coats and insulates botulism spores and creates an anaerobic micro-environment which allows the spores to live in a high-heat environment.
Meats
Most meats and fish are too oily to be canned correctly. The oil allows for botulism spores to stay inside the jar.
Purees
Similar to refried beans or peanut butter, purees like pumpkin puree or squash puree are too gelatinous to can at home. Cooking cubed pumpkin however, is a nice alternative that is safe to eat. Cubed squash however will compress during heating and become too thick.
Please Note
This list is made of items that have unproven canning recipes. Before you say, “I’ve canned those items and I’m fine,” please note that many canned foods aren’t guaranteed to have botulism spores but they are unproved when using the home canning process. Just remember that because your items haven’t had botulism spores in the past doesn’t mean they couldn’t in the future.


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As with anything, it is recommended to consult your physician before taking any medications, supplements or before making any significant changes to your dietary habits including the use of medicinal herbs. Side effects can occur with any of these herbs, the most common of which may be an allergic reaction. Again, consult a physician about using these herbs and proper dosing.
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Up to this point, the military had created many MREs including spaghetti, lasagna, vegetable dishes and more. However, many food items couldn’t be packaged into a meal that would remain stable in a pouch for 5 years.
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Catfish. In Florida, Tilapia are illegal. So, many people use catfish instead.
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However, these homemade MRE packets are great for camping or emergency supplies. If you add an oxygen abosorber into the bag, you should be able to get a pretty long shelf life out of the packet and they could easily fit in the trunk of your car or in a 72-hour kit.





