How Long Does It Take to Process Tomato Sauce in Pressure Canner?

How Long Does It Take to Process Tomato Sauce in Pressure Canner

Tomato sauce can be used to eat different kinds of meals and that’s why you should always have it at home. It’ll be a good idea to can a large quantity of tomato sauce in jars so that you can always warm a few jars for your family’s meals.

With a pressure canner, your tomato sauce can stay for up to two years on your shelf. So, how long does it take to can tomato sauce in a pressure canner? We’ll explain right below.

Being a lovely mother of two and the soulmate to the best man in the world, all I can say is that tomato sauce has always been my hard-to-believe secret of being me. It sounds ridiculous but, trust me, it is.

Food has always been one of the things that keep us together as a family. Besides, as a working-class babe running helter-skelter during contingent periods is no longer necessary, thanks to my pressure canner, anyways.

What I do right now is that I often use my pressure canner to preserve my tomato sauce. Therefore, emergent times don’t overwhelm me as they used to again: not anymore.

All I just have to do is reach out to my tomato sauce as fast as possible, then make my vegetable broth, stew, or so. Meanwhile, my folks have been asking me is How Long Does It Take to Process Tomato Sauce in Pressure Canner to get it well preserved in the pantry.

Well, my response has always been these formats that I will be sharing with you now. So, if you want to stow your tomato sauce indefinitely, then you’ve really got to check this out.

Let me begin with steps to making a great tomato sauce first before moving on to other spheres. Come and find out the ingredients below:


  • (97-piece of) Fresh Tomatoes.
  • 2-tsp of salt (for each quart).
  • Clove garlic and mince.
  • Onions – 4-yellow onions and 3-big red ones.
  • Parsley and celery (if you’re a core vegetarian).


Get as many tomatoes as you want. Choose fresh ones alone. Rotten ones are not good for your health. I bought a 35lb-weighed tomato pack because I wanted to save like seven-quart jars. You can decide on yours, anyways.

It’s quite a straightforward experiment; remember that we’ll be doing this together. So, do it in your own way while I do mine in my own little way.

Lemon juice and salt are great at preserving tomato sauce, so they are what you should make available. Choose between pint and quarts jars and get them ready alongside your pressure canner.


  • I removed the outer layer of each tomato. Trust me; it’s what I really have to create time for – my Manchi doesn’t like. I transfer each of the tomatoes I have unshelled inside the bowl.
  • Tip: Simmering the fresh tomatoes in one minute or so could ease the removal of their shells.
  • When I was done, I began to remove the seeds and some parts I had never considered. Meanwhile, I wasn’t using my bare hands but sanitized gloves, which covered my hands properly. My blender took charge as I was done with everything.
  • Chop the onions and vegetables into pieces that the blender’s blades can grind into solution alongside the tomatoes.
  • Although some like mashing tomatoes with their ladles, but sadly I don’t, especially for tomato sauce. I would instead blend everything until the results come satisfying.
  • Fill each of the jars after sterilizing them with lemon juice before the next step.

Convey the sauce inside the quarts. Make sure you don’t fill them to the brim but leave a 1-inch space distance from the tip. Add the 2-tsp salt to each quart jar to preserve it before covering up their tops with their lids.

How Long Does it Take a Pressure Canner to Process Tomato Sauce?

This answer depends on the altitude of your location and how fast your pressure canner is. The higher the altitude, the longer it will take for pressure to build up in your canner.

However, at about 1,000 feet above sea level, it will take most pressure canners about 25 – 30 minutes to can tomato sauce effectively.

The timing should start after you allow the canner to vent off the steam. That usually takes about 15 minutes. So, altogether, your canner needs 40 -45 minutes to process tomato sauce.

Does tomato sauce require pressure canning?

Yes, it does. You can’t substitute that for cauldrons. Pressure canners have designs that enhance the apt destruction of micro-organisms of any form.

Unlike your conventional pots, pressure canners will heat the tomato sauce to a degree of 240 degrees Celsius. Neither do I recommend replacing this with a water bath canner as you’d have to fill your pressure canner’s halfway to prepare this, while you’d only need to fill the water bath canner in a way that you can immerse the quarts.

Moreover, pressure canners heat food at a higher temperature than water bath canners. So, I prefer using a pressure canner over other options to keep my tomato sauce in preservative modes till I am ready to use it.

How do you cook tomatoes in a pressure canner?

After preparing the tomato sauces and filling the quart jars on the stove burner, place the pressure canner at the top.

Fill the pressure canner halfway to position the quarts in their perfect spots. Lock the lids around the cauldron and set the gauge. Set the pressure gauge if you’re using pint jars to 10-pound and the 15-pound option if you’re using quart jars.

What I do is that once the water boils and I can see from the vents of the canner, I reduce the level of the heat and allow the process to take place steadily for 45 minutes for my quart jars. However, you can consider 30min for your pint jars; it all depends on your choice.

How long do you cook tomatoes before canning?

Let me use this medium to buttress the whole scenario properly. You see, it’s expedient to read the pressure canner’s manual before you embark on pressurizing your canned tomato sauce. After stacking the pressure canner with the quart jars, you’re to lock down the lids.

Raise the burning temperature to a high degree until the little water you add boils so well (some pressure canners don’t encourage minute while some give an estimated gauge). It’s after you’re done, then you’d have to pressurize it all through the 45min.

You’re to reduce the burner’s heat release, lock up the lid tops more properly, and then set the gauge. I use the 10-pound option for mine because where I live actually is 6,000ft above sea level. You can find out yours in respect to where you live. Once the time elapses, the processing will definitely stop – you’re done!

What happens if you forget to put lemon juice in canned tomatoes?

Regardless of what you’ve done, preserving the tomato juice with vinegar or lemon juice is the prominent way to expedite your assurance. Lemon juice will keep the tomato juice for a long time and retain its freshness.

It’s a method of acidifying the food in the prevention of botulism. Since bacteria cannot decompose on acidified contents, leaving out lemon juice risks the possibility of quick bacterium buildup.

In fact, if you’ll be saving the tomato sauce in your pantry for a long time, then you really have to consider preserving the tomato sauce with lemon juice. Add it to the jars before filling them with the tomato sauce to make the sauce so saturated.

Do jars have to be fully submerged when canning?

If you’re using a water bath canner, then you’d need to submerge the jars in water because it doesn’t heat the cans as pressure canners. Pressure canners have the capacity of heating your cans to 280 degrees in a few minutes because of their construction. In other words, if you’re not sure of using a pressure canner, then submerge the jars in the boiling water before processing the food.

Final Word

Canning tomato sauce takes 40 – 45 minutes after putting the canner on your stove. The time it will take to prepare the sauce and fill the jars is not included. You can figure that out.

Also, if you have a sophisticated pressure canner, canning tomato sauce may not take that long. Most importantly, our idea is a general one. It is better to follow the instructions that come with your pressure canner.

That’s how long it takes to process tomato sauce with pressure canners and not get it wrong. As you’ve learned, it’s not about how long but how well the whole process goes. Inasmuch you get the preparation right, you can use other saving techniques, so ideally. Doing this is the best way to save your tomato sauce for a long time and get it right

June Brandt
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