How To: Canning Tomatoes For Homemade Tomato Sauce

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Boiling the mason jars to create a seal

Along with making our own wine and sun dried tomatoes,  my family also cans fresh plum tomatoes every August for use throughout the year.  The canned tomatoes are used mostly for making tomatoe sauce.  Canning your tomatoes produces a better tasting tomato sauce and, of course, saves you money over the long term (especially after you’ve owned the canning equipment for several years).

Tomato canning should be done outdoors and with a large group (you’ll want to set up stations to work efficiently).  Pasta with tomato sauce is probably one of the most popular dishes made at home in the US, so you’ll definitely go through the jars you produce.  Let’s get into the details:

Supplies and Tools

Let’s start with a list of the equipment and supplies you’ll need:

Using a mechanical tomato crusher to make passato or canned crushed tomatoes

 

Filling the mason jars with crushed plum tomatoes and basil

 

Neighbors and friends making canned tomatoes

  • Mason Jar handler (this is used to lift the boiling jar out of hot water)
  • 3-4 sharp knives for cutting plum tomatoes
  • 2-3 extra large stainless steal bowls
  • 2-3 extra large ladles
  • Lots of clean dish towels and old clothing (you’ll want to wear old clothing during the entire process)
  • Plum tomatoes are ideal for making tomato sauce; my family usually purchases about 6 bushels from any one of the local fruit and vegetable markets in our area.
  • 2-3 fresh basel leaves are needed for each mason jar, so you’ll want to have 8-10 bunches of basel available (grow your own beginning in the Spring so you don’t have to buy it!)

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Large pots for boiling the mason jars - done outdoors for multiple reasons

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If you’re canning in large groups I would suggest that you split costs with your friends and family and rotate the location of the event each year (a large backyard or garage is an excellent choice).

General Process

  1. Start by washing all of the plum tomatoes and laying them out on some cardboard covered by an old table cloth or two (clean of course)
  2. You’ll next need to core all of the tomatoes and cut into four small pieces.  This is where a large group will come in handy; you should be able to get through six bushels of tomatoes in about two hours with four people cutting and coring.
  3. Take the cored and chopped tomato pieces and cook in an extra large pot for 30 minutes (remember you’re cooking the tomatoes without any other ingredient)
  4. Move the cooked pieces from the pot to your tomato crushing machine.  This step is probably the messiest, requiring that you clean the machine’s filter every 15 minutes or so (the filter should catch the seeds and most of the tomato skin).  You’ll need several extra large bowls to catch the crushed tomatoes coming out of the machine.
  5. Next, you’ll want to have your sterile mason jars lined up and ready to be filled with both crushed tomatoes and 2 basel leaves per jar.   Use the extra large ladles to fill the jars and try to be as neat as possible.
  6. After you’ve filled the jar, you’ll want to place a NEW lid and a ring top on each jar.  You can re-use the metal ring tops, but the metal/plastic lids need to be new in order for a proper seal to take place.
  7. Tighten the lids and rings as securely as possible.
  8. Fill your extra large pot with water and set on the cast iron stove burner and bring water to a boil
  9. Place between 8-10 mason jars into the boiling water bath for approximately 45 minutes.  You can manually drop the jars into the water with a jar handler but use caution.
  10. Remove the jars from with boiling water using the jar handler and several dish towels (here you will need two people, one who will remove and another who will grab the jar)
  11. After the jars have cooled make sure to check a few of them to see if the lids have formed a tight seal (you can do this by unscrewing the ring or band).
  12. You’ll want to store the jars in a cool dry place.  You can label the jars with the date, if you wish.  Stay tuned for a tomato sauce recipe!  Note the above process will yield about 125 12 X 1L size jars (so it’s best to can with 2-3 families).

Here’s a printable version of the supplies/ingredients/process:

How To: Canning Tomatoes For Homemade Tomato Sauce
 
 

Ingredients
  • Ball Mason Jars (12x1L size)
  • Bands with dome lids
  • Extra large pot for boiling jars (buy the largest pot you can find; the ones available at canningpantry.com seem small, so shop around in your area and see if you can find pots that hold between 8-12 jars at a time, as it will make the process go a lot quicker)
  • Electric Tomato Crusher
  • Cast Iron Stove Burner
  • Mason Jar handler (this is used to lift the boiling jar out of hot water)
  • 3-4 sharp knives for cutting plum tomatoes
  • 2-3 extra large stainless steal bowls
  • 2-3 extra large ladles
  • Lots of clean dish towels and old clothing (you’ll want to wear old clothing during the entire process)
  • Plum tomatoes are ideal for making tomato sauce; my family usually purchases about 6 bushels from any one of the local fruit and vegetable markets in our area.
  • 2-3 fresh basel leaves are needed for each mason jar, so you’ll want to have 8-10 bunches of basel available (grow your own beginning in the Spring so you don’t have to buy it!)

Process
  1. Start by washing all of the plum tomatoes and laying them out on some cardboard covered by an old table cloth or two (clean of course)
  2. You’ll next need to core all of the tomatoes and cut into four small pieces. This is where a large group will come in handy; you should be able to get through six bushels of tomatoes in about two hours with four people cutting and coring.
  3. Take the cored and chopped tomato pieces and cook in an extra large pot for 30 minutes (remember you’re cooking the tomatoes without any other ingredient)
  4. Move the cooked pieces from the pot to your tomato crushing machine. This step is probably the messiest, requiring that you clean the machine’s filter every 15 minutes or so (the filter should catch the seeds and most of the tomato skin). You’ll need several extra large bowls to catch the crushed tomatoes coming out of the machine.
  5. Next, you’ll want to have your sterile mason jars lined up and ready to be filled with both crushed tomatoes and 2 basel leaves per jar. Use the extra large ladles to fill the jars and try to be as neat as possible.
  6. After you’ve filled the jar, you’ll want to place a NEW lid and a ring top on each jar. You can re-use the metal ring tops, but the metal/plastic lids need to be new in order for a proper seal to take place.
  7. Tighten the lids and rings as securely as possible.
  8. Fill your extra large pot with water and set on the cast iron stove burner and bring water to a boil
  9. Place between 8-10 mason jars into the boiling water bath for approximately 45 minutes. You can manually drop the jars into the water with a jar handler but use caution.
  10. Remove the jars from with boiling water using the jar handler and several dish towels (here you will need two people, one who will remove and another who will grab the jar)
  11. After the jars have cooled make sure to check a few of them to see if the lids have formed a tight seal (you can do this by unscrewing the ring or band).
  12. You’ll want to store the jars in a cool dry place. You can label the jars with the date, if you wish. Stay tuned for a tomato sauce recipe! Note the above process will yield about 125 12 X 1L size jars (so it’s best to can with 2-3 families).

Notes
Yield 125 12 X 1L size jars.

 

  • http://www.thegreenestdollar.com Heather

    Hi Vincent,
    I found your site when you linked to mine (thanks for the linkback!)
    Just wanted to say I love what you’re writing about, especially this post about canning tomatoes! It looks like a lot of work, but it also looks super fun.
    I’ve always wanted to do this, and am definitely going to bookmark this for summertime. I don’t get enough sun to grow my own tomatoes, but I do live within two blocks of a fabulous farmer’s market where I can stock up for cheap.
    Thanks for the great information!
    -Heather@TheGreenestDollar.com

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  • http://mysmallhomestead.com cindy

    I love this how to article. I have always wanted to try my hand at canning tomatoes and hopefully this year, I will have enough to can.

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  • Anna Tenikoff Smith

    This is sooooo gr8….This is exactly the way my parents used to make the sauce…..as kids we had soo much fun….I can’t beleive I found a website with the same method my parents made sauce. They’re not around anymore, so i’ve been scouring the internet inhop I could find a recipe like the one dad used…..& I have…..So thank-you very much……it’s so exact, the way you guys do it, is the same way we did it…..exactly…..that’s why i’m freaking our eh! Except my parents weren’t Italian, they were RUSSIAN…..Anyways just wanted to say thanks a bunch for putting this on the internet :)
    God Bless you so much :)
    Anna
    xx

  • Vincent Scordo

    Hi Anna,
    Glad I could bring back some memories! Interesting how Russian culture cans tomatoes as well! Keep on reading Scordo.com and leave comments!
    Vince

  • DIANE CAVALLARO

    hi vincent,your description of making your own tomato sauce,brought me back,fifty years,when I was newly married and only 20yrs old,and never exposed to that kind of cooking quantity,even though my father was Italian,my mother wasnt,but in any event I wanted to learn how to make fresh sauce,never expecting exactly what you described,I think I told my husband,Ismelled tomatoes for week after we finished,infact the whole neighbor-hood had the scent of tomatoes (bensonhurst,bklyn) and I must say, that is one of my treasured memories. thanks for the pictures. diane

  • http://www.scordo.com/blog Vincent Scordo

    Hi D.,
    Thanks for the comment. I’m glad you liked the pics. Thanks for sharing your memories!
    Best,
    Vince

  • Joseph Chiaravalloti

    My secret method, good for one working alone indoors. Fill a stockpot with washed and stemmed Roma tomatoes and add a cup of water. Cover and heat for a few minutes until the tomato skins crack open. There will be a little straw-colored liquid in the pot besides the cooked tomatoes.
    Using a large food processor (I use a Cuisinart DLC-X), process the tomatoes in several batches, putting the pulp into a food mill (I use a Foley Food Mill) or Chinoise. Strain out the skin and seeds, fill the quart jars, add a pinch of salt and some basil leaves.
    Apply scalded lids and process 30 minutes in a pressure canner. I use a 7 quart Mirro-Matic.

  • Laura

    Hello,
    Does anyone know where to find the large aluminum tubs that are shown in the picture above? I have searched almost every website there is but most of the canner’s I find are made for indoor use,
    Thanks a bunch!
    Laura

  • http://www.scordo.com Vincent Scordo

    hi laura, those pots are made out of aluminum and are probably 30 years old or so. you may want to try a restaurant supply store, I haven’t seen them online (per your point)
    Vince

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  • Laura Trotta

    Hi Vince, I found a place right near my house and I brought the pots and some other equipment there. Thanks for the help this was very imformative, this will be my first year doing it alone, my family used to do this when we were kids and I want to start up the tradition again, everyone tells me I’m crazy but I cant resist a good sauce, wish me luck!!
    Big Thanks,
    Laura

  • http://www.scordo.com Vincent Scordo

    Hi Laura,
    Great, if you need any help , please feel free to send me an email and I’ll respond as quickly as possible! Good luck and keep the tradition going!
    Best,
    Vince

  • Laura Trotta

    Hey Vince,
    This saturday my family and I made the sauce but some of the jars did not seal correctly, is there any way I can re-seal them again? or should I just cook them right away before they go bad
    thanks
    Laura

  • Laura Trotta

    Hi Vince,
    My family and i spent all day Saturday jaring the tomatoes, but some of them did not seal properly, do you know if there is anyway i can either try to reseal them? or do you reccomend freezing them?
    Thanks
    Laura

  • http://www.scordo.com Vincent Scordo

    Hi Laura,
    Did you have new tops? New tops are necessary every time you can and if the screw lids are bent, I would buy them new as well. Did you have your water at the right, boiling ,temperature?

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  • Dario

    Hi, i live in italy. I’m from Florence.
    My family and I do tomato sauce – “pomarola” or “ salsa di pomodoro” every year. It is not as fun as some of you have sayed but is far way better than anything you can buy.

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  • Sam_Shepherd

    thanks for sharing :o ) very delicious

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  • http://www.facebook.com/carmela.capellupobeaver Carmela Capellupo-Beaver

    Hey Vince, My children were raised canning tomatoes, whether they liked it or not!  nothing like canning your own tomatoes.  you have to be a serious Italian to do this!!!

  • http://www.facebook.com/carmela.capellupobeaver Carmela Capellupo-Beaver

    Ciao, Vincenzo!  My children were raised canning tomatoes, whether they liked it or not!!!!  you have to be a serious Italian to jar tomatoes!!!! 

  • Susan

    After many years, many gardens, and lots of tomato sauce, we streamlined our “sauce” processing. When the tomatoes are peeled, etc., we make the sauce in a huge pot, then boil it down, then freeze it in quart bags. We used to can the tomatoes, but freezing the sauce after cooking saves the jar step. It works for us!