How to Start Canning Tomatoes: Perfect Recipe and Guide

What is Canning?

Canning is a method of food preservation that involves placing foods in jars or similar containers and heating them to a temperature that kills microorganisms that cause food to spoil.

Heat also inactivates enzymes in the food, which can lead to rotting.

During the heating process, air is forced out of the jar, forming a vacuum seal as it cools. This seal prevents air from entering the product and contaminating the microorganisms.

This increases the shelf life of canned produce, and certain high acid foods, such as tomatoes and fruits, can survive up to 12 months.

To be clear, canning refers to the heat treatment procedure, not the sort of container in which a food item is canned.

Today we’ll be canning tomatoes in a step-by-step process that will give you incredible results easily at home.

Tomatoes from damaged or frost-killed vines should not be used because they may carry harmful pathogens that may not be killed during processing.

What are the Different Types of Canning Methods?

There are two main types of canning namely water bath canning, and pressure canning. Let’s look at each of these in more detail:

Water Bath Canning

Water bath canning is a method of canning that involves immersing the jars in hot water and heating them for a set amount of time. A water canner is nothing more than a large saucepan or large pot with a removable rack that holds all of the jars.

The rack keeps the jars from touching the bottom of the pot and provides for even spacing.

It also allows boiling water to circulate around and beneath the jars, resulting in a more equal heat treatment of the contents.

Pressure Canning

Pressure canning is a type of canning that is used to process foods that need to be processed at higher temperatures.

This method should be used for less acidic foods, such as carrots and cucumbers since the water bath canning method is not a good way to heat treat such foods.

Many people think that pressure canning is done in traditional pressure cookers, but that’s not true.

The pressure cooker is not a great alternative for temperature control, and it increases the danger of food not being properly heat-treated, which is required in order to eradicate the resistant Botulism-causing bacteria.

Additionally, adjusting processing times safely is nearly impossible due to variations in pressure cooker sizes.

In short, never use a pressure cooker and always use a pressure canner when following this method.

Options for Pressure Canners

Pressure canners are different from water bath canners because they either have a weighted gauge or a dial gauge.

Pressure is indicated by a dial on dial gauge canners. You must keep an eye on the dial gauges to ensure that the pressure does not fall below the required level.

Dial-gauge canners are preferred at higher altitudes because you can more easily monitor and adjust the pressure in the canner to cater for higher altitudes.

Weighted-gauge canners, on the other hand, have small weights placed over the vent that weigh around 5 to 15 pounds.

When the proper pressure is applied, they rock or jiggle.

I wanted to make sure you had as much information on canning tomatoes and the methods as possible, but the method we’ll be using today is incredibly easy and simple to do at home.

Let’s see how to pick a preferred method for canning and then understand how the recipe works.

How to Choose a Preferred Canning Method

Different foods have varying acidic contents, and the acidic content is by far the most important factor in deciding which canning process to choose.

Foods with a higher PH-value have a greater acidic content, which makes bacteria’s environment more unfriendly.

Simply boiling them at 100 degrees Celsius (212 degrees Fahrenheit) is enough to eliminate any remaining microorganisms.

Water bath canning is an adequate method of food preservation for high-acid foods since bacteria are less likely to survive.

Low-acid foods, on the other hand, can be a breeding ground for bacteria if not canned correctly.

These foods must be boiled at temperatures greater than 100 degrees Celsius, and increasing the pressure is the only technique to raise the boiling point of water. As a result, the ideal canning method for various sorts of produce is pressure canning.

Boiling water canners are capable of processing certain low-acid foods however this depends on the recipe.

Cucumbers, for example, are normally low in acid, but when pickled with vinegar, they form a high-acid food that may be processed in a water bath canner.

The Best Method for Canning Tomatoes

This is why, the best method for canning tomatoes is an easy water bathing technique.

I grew up canning fruits and vegetables with my mom and still enjoy doing it to this day. I’ve tried a few different blends in the past.

This particular canning tomatoes recipe is my aunt Lyuda’s, and the one that takes the number one spot for me.

In my experience, tomatoes are way easier to can than pickles. Canning, in general, feels very therapeutic and satisfying to me. From start to finish. And then you enjoy the fruit of your work in your accomplishment. For their own reasons, my kids are not very big canned tomato fans, so I do not can too many jars. These 8 jars will be just enough for my husband and me, which is all right with me. 

Once you’ve finished canning tomatoes, allow the jars to stand untouched for 30 days before opening a jar to allow time for the tomatoes to absorb and enrich with the flavors.

They go perfectly with any potato dish (especially fried potatoes), any pasta dish, plov, etc.

I highly recommend you try this canning tomatoes recipe and method. Let me know how your experience was by commenting down below!

What Types of Acids Can You Use for Canning Tomatoes?

There are certain things to keep in mind when canning tomatoes. The most important thing is using some acid when prepping the tomatoes for canning.

The National Center for Home Food Preservation advises adding a little acid to tomatoes regardless of the canning method, so go ahead and give those tomatoes an acid boost even if you’re pressure-canning.

When canning tomatoes, more acid is required to maintain a pH level that prevents bacteria.

There are three simple ways you can use to adjust the acidity when canning tomatoes.

Distilled White Vinegar

This is by far the best acid to use for canning tomatoes. It’s cheap and doesn’t alter the flavor of the tomatoes too much.

Citric acid

The next one is citric acid. It’s another good option since it doesn’t affect the flavor of tomatoes.

Bottled Lemon Juice

Bottled lemon juice has been evenly acidified, resulting in a constant and predictable acid (pH) level required for safe canning. Freshly squeezed lemon juice should not be used since the level of acid in the juice cannot be determined.

Do I Need to Peel Tomatoes?

Not entirely necessary, but if you want to you can blanch them in a pot of water to remove the peels.

To do this, first score the tomatoes with a paring knife. Then, depending on the size of the tomato, blanch a few tomatoes at a time in the boiling water for just 30 seconds or until the skin begins to curl up where you scored it.

Next, using a slotted spoon, remove them and dip them in ice water. After that, put them in a colander over a bowl to collect any excess liquid.

Remove the skins and cores of the tomatoes when they are cool enough to handle.

Canning Tomatoes Ingredients

Canning tomatoes at home is an easy and rewarding process. Here’s what you need to do it at home today:

• Water: We’ll be using some filtered water for canning tomatoes perfectly.

Sugar: We’ll be making a syrup to add to your canned tomatoes to not only enhance their flavor but also help them preserve better.
Salt: You’ll also need salt to make the syrup and add to the tomato mixture.
Distilled white vinegar: As I mentioned above, it’s incredibly important to add an acid to your tomatoes regardless of the method of canning we’re using. So we’ll be adding some distilled white vinegar since it’s simple and easy to find everywhere. We’ll be using 6 tablespoons of it.

Veggies: We’ll also be adding a bunch of veggies to enhance the flavor of our canned tomatoes. My recipe recommends adding yellow onions, garlic cloves, and carrots, but you can add other ones you might like such as celery and green peppers.
Spices and herbs: The next thing you’ll need is some spices and herbs. We’ll be adding some peppercorns, crushed red pepper flakes, and bay leaves to our tomato mixture.
Fresh herbs: I also recommend adding dill to your tomato mixture for the most delicious canned tomatoes you’ve ever had!

How to Store Unopened Canned Tomatoes

If canned tomatoes are unopened, they can be stored at room temperature. The best place for them is somewhere cool (about 70 degrees Fahrenheit), clean, and dry, such as your pantry or kitchen cabinet.

You should never put canned tomatoes under the sink, in a damp basement or garage, above the stove, or anywhere else where the temperature is either too low or too high.

If you follow all of the instructions in the recipe, your canned, unopened tomatoes should last you around a year.

How to Store Opened Canned Tomatoes

You shouldn’t leave opened or leftover canned tomatoes out at room temperature for more than 2 hours. The fridge is the best place to store them.

Don’t forget to transfer your canned tomatoes to an airtight glass or plastic container before refrigerating. You can extend the amount of time you have to enjoy your tomatoes by up to 5 days as long as you keep them stored in the refrigerator continuously.