What is Steam Canning…and How to Do It

Are you tired of spending hours on end, canning fresh produce every summer? Have you been searching for a faster, more efficient method to preserve your food? 

Look no further than steam canning. This game-changing technique allows you to save time and energy while still preserving the quality and flavor of your fruits and vegetables. 

Unlike traditional water bath canning, steam canning requires less water, takes less time – and is now proven to be just as effective for certain foods. 

Join the steam canning revolution! Your taste buds (and your schedule) will thank you. Here’s a guide on everything you need to know about steam canning – and tips for getting started. 

What is Steam Canning?

Steam canning is a time-saving, energy-efficient, and safe method of preserving high-acid foods like jams, jellies, fruits, pickles, salsas, and chutneys. It’s an excellent alternative to traditional water bath canning, and it’s gaining popularity among canning enthusiasts. 

With steam canning, you can process your fresh produce quickly, efficiently, and without heating up your kitchen.

So, what exactly is steam canning? 

The short answer is that it’s a process that uses steam to create an environment inside a canner that will safely preserve the foods you want to store. Instead of submerging jars in boiling water, you place them in a specially designed pot filled with a small amount of water and heat it until the water turns into steam. 

This steam then circulates inside the canner, creating the right temperature and pressure needed to preserve your fruits and vegetables. After they’re processed, the jars are left to cool and form a vacuum seal that keeps bacteria out and preserves the food inside.

One of the best things about steam canning is that it saves you time and energy costs compared to water bath canning. A recipe calling for 10 minutes processing time in a water bath can take at least 55 minutes, while steam canning the same recipe takes only 25 minutes. 

Plus, since steam canning requires less water than water bath canning, it saves you money on your energy bills and reduces your environmental footprint.

To use a steam canner, you need a specially designed pot that traps steam and shuts it inside, creating the ideal pressure type of environment for canning. 

A steam canner looks like a regular pot, but it includes a raised rack for setting jars on and a lid with a built-in gauge that lets you monitor the pressure..

What Foods Should Be Steam Canned?

Steam canning is a popular option for high-acid foods like jams, pickles, and tomato products. But what exactly qualifies as a high-acid food, and why should you consider steam canning for these items?

First, let’s talk about acidity. High-acid foods have a pH of 4.6 or lower, which means they naturally contain enough acid to inhibit bacterial growth. This is why it’s safe to use a simpler canning method like steam canning, which relies on high heat and steam to kill off any potential pathogens. 

Some examples of high-acid foods include:

• Most fruits: Apples, berries, cherries, citrus fruits, grapes, peaches, pears, plums, and more. These can be used to make jams, jellies, preserves, and fruit butters.
• Tomatoes: While technically a fruit, tomatoes merit their own category because they’re a popular canning ingredient and have a unique acid profile. Some tomato products that can be steam canned include salsa, sauce, crushed tomatoes, and whole peeled tomatoes with added lemon juice.
• Pickled vegetables: Cucumbers, beets, carrots, green beans, and other veggies can be pickled in a vinegar-based brine to lower their pH and make them safe for steam canning.
• Acidic condiments: Hot sauce, ketchup, relish, and other tangy toppings are often made with vinegar, lemon juice, or other acidic ingredients that make them prime candidates for steam canning.

It’s worth noting that some “borderline” foods may fall between the high- and low-acid categories, such as peaches in syrup or mixed vegetable pickles. In general, these should be pressure canned to ensure safety, as the extra heat and pressure can penetrate the food and kill off any potential botulism spores.

What Are the Disadvantages of Steam Canning?

Let’s be real, there aren’t many disadvantages to steam canning. It’s a fantastic alternative to water bath canning, and it saves you time, energy, and water. However, there are a few limitations you need to be aware of before you jump on the steam canning bandwagon.

First and foremost, steam canning can only be used for processing times of 40 minutes or less. This is due to the limited water capacity of a steam canner. If you’re planning on processing low-acid foods like tomatoes, you’re better off using a water bath or high-pressure canner. Trust us – you don’t want to take any chances when it comes to food safety.

Finally, steam canning is only suitable for fruit and acidic foods. If you’re planning on canning non-acidic foods like vegetables, meats, or fish, steam canning isn’t an option. Stick with water bath or pressure canning.

Is Steam Canning the Same as Water Bath or Pressure Canning?

The short answer is no. Steam canning involves heating up your canner with the weight off, allowing non-pressurized steam to build up inside. 

On the other hand, water bath canning involves boiling jars in a pot of water.

Pressure canning involves using a canner to achieve high levels of pressure and temperature to safely preserve low-acid foods.

Because these three methods are unique and are all very different, it’s important that you take the time to research canning recipes and find (and use) one that is specific to whatever you’re trying to process and the type of canner you’re working with. 

What Kind of Steam Canner to Buy

There are a few different options to choose from as you’re shopping for a steam canner.

First up is the typical dome lid steam canner – what many people consider the “OG” of steam canning. It comes in two versions. The most common is a steam canner with a built-in temperature gauge, which makes it easy for you to keep track of things without having to think too much about it. There are also ones sold without temperature sensors which require a bit more precision but still work quite well.

Newer to the market are multi-use steam canners. These can do steam and water bath canning and can even double as a stockpot. 

This kind of canner also comes with a temperature gauge knob on the lid, making it a breeze to use. And the beautiful thing is that this rack can be used in a couple of different ways: for water bath canning to contain the jars neatly within, or for steam canning to position the jars right on top. So, if you’re in the market for a canner and want the option to do both types of canning, this dual-use pot is right up your alley.

Now, if you already have a water bath canner or stockpot, you can modify it into a steam canner. You just need to have a tall-enough rack to hold enough water to steam the jars for the time needed. The key is to make sure the water is below the jars, especially when processing pickles, to ensure even heating.

Steam Canning 101: Instructions

Water-bath or steam canning recipes should always be approved by research-backed, trusted sources before use. Follow their instructions carefully to ensure that your food is safely canned. 

With that in mind, here are some general instructions on how to use a steam canner for successful canning:

Step 1: Prepare the Food and Load the Jars

Start by preparing the food according to the recipe provided. Ensure that the food is hot and fill the jars with hot liquid. For best results, add in the bottom rack that is included with your steam canner. This will help to prevent the jars from coming into direct contact with the heat at the bottom of the canner. As you’re getting things ready, try not to let the jars cool too much before starting the steam canner.

Step 2: Get the Canner Ready to Go

Fill the canner with wateras stated by the recipe and put the jars in before covering the canner. Turn on the burner heat and wait for the steamer to heat up. When the steam canner is heated, a consistent plume of steam that is about six to eight inches tall will come out of the canner.

Step 3: Start Timing

The processing time should be accurately timed using the recipe provided. Always adjust your processing time for altitude. For the full processing time, be sure to maintain the column of steam. 

To maintain the steam level, regulate the heat. Low heat can cause the loss of steam, while high heat can cause the canner to boil dry within as little as twenty minutes. If you lose your steam, you’ll need to bring the canner back up to the right temperature so there’s steam, and then start your timer again to make sure you’ve processed the food safely.

Step 4: Cool the Jars Down

After the processing time is complete, let the jars cool down without touching them. Let them stay in the canner for five minutes with the lid on. Using oven mitts, remove the lid slowly, tilting it away from you to avoid scalding steam. 

Use jar lifter tongs or oven mitts to take the jars out, then place them on a towel or a wire rack away from cold drafts. Do not cover the jars, do not touch the rings, and do not tilt jars or turn them upside down. Instead, just let them sit untouched for 12 to 24 hours.

Step 5: Check the Seals and Store

Once the jars are cool, check the seals to ensure that they are tightly closed, labelled and date them, then store them in a cool, dry place away from sunlight. It is crucial to follow these instructions carefully for successful and safe canning.

How Many Jars Can a Steam Canner Hold?

First, let’s talk about jar sizes. You can use half pint, pint, and quart jars in a steam canner (as well as the smaller jelly jars).

Some people wonder if they can stack low-profile jars in a steam canner. In general, it’s not recommended because there’s not much research that’s been done on the effectiveness of steam flow when you do this. It’s not like certain models of pressure canners that are specifically designed to allow this to occur.

So what’s the maximum number of jars that can be safely used in a steam canner? It really depends on the size of the jars and the specific model of the steam canner. Always follow the manufacturer’s instructions to figure out the appropriate number of jars. 

Is Steam Canning Safe?

Let’s look at the facts. Steam canning has been approved by the USDA and the National Center for Home Food Preservation as a safe method for canning high-acid foods (those with a pH of 4.6 or lower). 

Why? Because steam canners heat up faster and use less water than traditional water bath canners. Less water means less time spent waiting for the water to boil, and less time spent standing over a hot stove.

But here’s the thing: you need to follow the instructions carefully. Make sure you’re using a research-tested and evidenced-based recipe, and adjust the processing time according to your elevation. Don’t process foods for more than 45 minutes, and never open the canner to refill the water while processing.

It’s also important to note that not all foods can be safely canned using a steam canner. Low-acid foods, like vegetables and meats, require a pressure canner to safely process. Stick to canning high-acid foods like fruits, jams, and pickles, and you’ll be good to go.

So is steam canning safe? Absolutely – but only if you play by the rules.

Where to Find Steam Canning Recipes

Now that you know the many joys of steam canning, you might be wondering where to find some trusty recipes to get you started. 

One excellent resource is the National Center for Home Food Preservation. They offer a plethora of steam canning recipes, complete with step-by-step instructions and safety guidelines. Plus, their recipes have been rigorously tested, so you can feel confident in their accuracy. 

Another option is to head over to your local library or bookstore. There are plenty of cookbooks dedicated to canning, some of which may include steam canning recipes. 

A quick search will yield a seemingly endless number of steam canning recipes. However, be cautious of blogs or websites that don’t have a clear source or haven’t included proper safety precautions. Typically, university extension websites are a good resource to rely on if you choose to use the Internet.

No matter which avenue you choose, remember to always follow the recipe and safety guidelines closely. Steam canning can be a wonderful way to preserve your favorite fruits and veggies – but it’s important to do so safely. You’ve got this!

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