This Dame Cooks A Collection of Recipes from Alaska to the South Pacific and Caribbean

Canning Vegetable Soup

05.15.2009 · Posted in Preserves & Condiments, Soups
Vegetables cooking in a canner

Vegetables cooking in a canner

Spring is here and it won’t be long before the Farmers Markets and roadside markets are brimming with veggies.  Take the advantage of lower prices by buying in large quantities.  This vegetable soup is the base for lots of winter soups.  Just open a jar, add meat, beans, pasta, or rice for those one dish meals on cold winter nights.

My mother-in-law gave me this recipe in the 1970′s.   Those were the days before farmers started growing hybrid tomatoes with lower acidity.   Hybrid tomatoes maybe great for eating fresh but not good for canning.  Unless you’re using heirloom tomatoes, which have higher acidity, you’ll need to add citric acid to each jar before water bathing.

Check jars to make sure there are no chips or dings in the top rim.  They will not seal properly if damaged.  Be sure to scrub jars, lids, and rings in hot soapy water.  Sterilize jars for 10 minutes in a canner of boiling water.  You can use the automatic dish washer for a sterilizing rinse and to keep jars and sealing lids warm until ready to pack.  Any un-iodized Local Kitchensalt will do for canning, but the best is Morton’s canning salt.  Click here for more information about canning:

Ingredients: – makes 8 quarts

  • 1 head cabbage, chopped
  • 1 quart sliced carrots
  • 2 1/2 quarts water
  • 2 bunches celery, chopped
  • 1/2 cup canning salt
  • 4 quarts peeled tomatoes
  • 6 large onions, chopped
  • 2 green bell peppers and 1 orange bell pepper, chopped
  • 1/2  tsp citric acid per jar

Method:

  1. Place all ingredients in a large canner.
  2. Bring to a boil and cook for 1 hour.
  3. Place 1/2 tsp of citric acid in each sterilized jar.
  4. Ladle soup into sterilized jars, wipe rims, apply seals and rings and tighten.
  5. Water bath jars under boiling water for 20 minutes.
  6. Carefully remove from bath and set on kitchen towels, out of drafts, until cool.
  7. Listen for pops of lids sealing.  Check all lids; if the lid spring back when press, it is not sealed.  Remove seal and discard.  Apply new seal and water bath again, or refrigerate and make soup for supper.

I’ve updated this post to include citric acid in the recipe.  This will ensure the pH level is acid enough for canning in a boiling water bath.  You can check acid levels before sealing jars with a litmus strip available at pharmacies, or wherever canning supplies are carried.

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No Responses to “Canning Vegetable Soup”

  1. localkitchen says:

    The soup looks delicious, but do you think it is acidic enough for safe canning in a water bath? These days, the recommendation is to add acid (lemon juice, vinegar or citric acid) even to straight tomatoes, which are right on the line of “safe” acidity at pH 4.6. This recipe looks like about 50:50 tomatoes and non-acidic veggies, which could boost the pH much higher than the safe level. It’s possible that if you are always using heirloom tomatoes, you would never see a problem – I’ve read somewhere that heirloom tomatoes are much more acidic, and that’s why in “days of old” it was safe to can tomatoes without any added acid. Modern tomato varieties were bred to reduce acidity, and therefore need the addition of acid, or canning in a pressure cooker.

    I’m far from an expert, but then again, botulism isn’t something I want to mess around with!

  2. You can check the pH with litmus paper to verify the acidity level. With or without the litmus test, it certainly wouldn’t hurt to add citric acid to this recipe. Use 1/2 tsp citric acid per quart of tomatoes (2 tsp for this recipe). You can also add some green tomatoes to the mix and that will lower the pH also since unripened tomatoes are higher in acidity. My mother-in-law, age 86, still cans this soup every summer with BWB. In all cases you want to use the freshest tomatoes, straight from the living vine is best. And be meticulous about scrubbing the veggies and jars before sterilizing in a roiling boil.
    Thanks for the comments.

  3. I’ve updated the post to include citric acid, 1/2 tsp in each jar before ladling-in the soup. I’m making soup this weekend and will give it the litmus test also.

  4. localkitchen says:

    I’ve tried the litmus paper test but had limited luck with tomato-based foods, as it generally relies on color change that is already in the orange-yellow area. I think I’m just spoiled; back in my lab days I had an ultra-sensitive pH probe meter – little did I know that I should have stuffed it into my gym bag at some point and smuggled it home! :)

  5. Coleparmer.com has food quality pH meters for $60 and a very good grade of plastic litmus strips for $9.50.
    All that said, pressure cooking veggies is still the safest method, so long as jars are properly sealed and stored in cool, dark pantries.
    This has been a worthwhile exercise, thanks for bringing up this important food safety issue.

  6. localkitchen says:

    JoAnn,

    Thanks much for the link to ColeParmer! I do play around with tomato sauce recipes and have often wished I could find a good source of reliable pH testing – I shall have to try these pH strips.

    Kaela

  7. Use the litmus test before sealing the jar as the citric acid is in the jar, not cooked with the veggies. Ohio State University guidelines for canning tomatoes is a keeper.
    http://ohioline.osu.edu/hyg-fact/5000/5336.html

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