can you preserve caramelized onions

These caramelized onions are the perfect combination of sweet and tangy. They are the perfect topping or condiment for any burger, hot dog, wrap, or even a nice way to jazz up your fresh salads. I’ll show you how to make them and then preserve them for long storage in your pressure canner.

****Disclaimer: Please note that this is NOT and APPROVED method according to the USDA and Center for Home Canning. It is considered a Reble canning method so please do you research and can at your own risk.

A delicious caramelized onion condiment that is sweet and tangy. These golden brown onions go amazingly well on wraps, burgers, hot dogs, and even on salads.

**Disclaimer: Please note that this is NOT and APPROVED method according to the USDA and Center for Home. It is considered a Reble canning method so please do you research and can at your own risk.

**Adjust the sweetness of these onions by just adding 1/2 cup of brown sugar or for sweeter onions use 1 cup to a larger crockpot full of onions. I like to use less if using real sugar or if I do the full cup I add more vinegar to balance it out. So they are easy to adjust to your liking.

The thing about cooking so many onions, though, is that you probably won’t need that many at one time. So there’s an essential second move whenever you’re making caramelized onions: Freeze them. Stashed in an ice cube tray, caramelized onions will keep indefinitely in the freezer.
can you preserve caramelized onions

What Tools Are Needed For Pressure Canning These Onions?

When it comes to this recipe you’ll need some pretty basic canning equipment. All of these tools can be purchased at local hardware stores, retail stores, or online through Amazon of course.

I love to have all my equipment out, wasted, and ready to go before I start the canning process. It is important when you are pressure canning that you follow the proper steps and the timing of each recipe.

So having all your tools out and at hand’s length will ensure that you are having to stop and step away to gram them in the thick of things.

Here is the list of tools that will help you have success with this caramelized onion recipe and canning it up for your pantry.

  • crockpot or slow cooker
  • half-pint canning jars with lids
  • clean hand towels
  • a ladle
  • canning funnel
  • Canning Bubble Remover
  • jar lifter
  • and of course a pressure canner

Most of these tools such as the funnel, bubble remover, and jar lifter can be purchased in a Complete Kit Like This One on Amazon or your local store that carries canning supplies.

Nothing has to be fancy, you just need quality tools that will help you safely can your recipes. If you are new to canning I suggest finding a lot of great canning books like the Ball Complete Book Of Home Preserving or the USDA Complete Guide to Home Canning.

You’ll learn so much and the books are super handy to have on your bookshelf because you can never double-check and recheck things too much when it comes to food safety.

Also, don’t underestimate utilizing some of the amazing YouTubers that specialize in canning videos, they can be a total gem to glean so much knowledge from also.

How To Make Caramelized Onions In The Slow Cooker

Caramelized Onions are onions that have had the natural sugars within them caramelize due to cooking them a long time with a slow heat process.

If you’ve never had caramelized onions before then man have you been missing out! They go great with many foods like burgers, hot dogs, roasts, even tacos, and salads!

I recently shared an Easy Caramelized Onion Dip recipe here on the blog so if you haven’t seen that dip yet I totally hope you check it out after you finish with this post on canning the onions. That dip is so amazing!

It is easy to cook caramelized onions on the stovetop but the process can be lengthy to develop all the flavors. So I really like to have these onions on hand in my pantry so that when I’m ready to use them it is super easy to grab a jar and serve them up.

This is a pretty easy recipe to can if you are newer to pressure canning then just follow the proper instructions for your canner, the recipe carb below, and always check the National Center for Home Food Preservation for some great food after guidelines for canning.

  • 10 pounds of onions
  • butter or avocado oil
  • salt, pepper, garlic
  • Balsalmic Vinegar
  • Brow Sugar Option of Choice

With just those five things this recipe comes together super quickly. When it comes to the onions you’ll see that I didn’t specify and that’s because I use whatever onions I have in bulk to make this recipe.

If you would like them to be extra sweet then you could opt for a Vidalia onion or any kind of sweet onion, but we don’t like the overly sweet so I tend to just use white or yellow onions.

When I sweeten my caramelized onions I typically use a low carb brown sugar alternative like Golden Monk Fruit or even the Trim Healthy Mama Super Sweet. But if you aren’t carb sensitive regular brown sure will work out great.

Once you have all your ingredients gathered and you are ready to get started loading the slow cooker with your sliced onions and the rest of your ingredients.

I like to prepare these in the evening and let them cook all night as I sleep that way they are cooked and ready to process in my canner by mid-morning. I love the hands-off cooking you get with the slow cooker!

Once the onions have cooked to a nice dark golden brown you are ready to prepare your canner and fill your jars. You can see the full step by step of how to can the onions on the recipe card at the end of this post.

Canning CARAMELIZED ONIONS and How to Clean The Jars For Storage!


Can caramelised onions be stored?

If you’re going to spend an hour or so making caramelized onions, you might as well make a lot of them! Stored in an airtight container in the fridge, they’ll keep for a week. You can also freeze them for up to two months. I like to freeze caramelized onions in ice cube trays.

How do you store and reheat caramelized onions?

The good news is that you can make a big batch of caramelized onions and keep them in the fridge to use throughout the week. You can also freeze caramelized onions and they’re just as delicious when thawed and reheated.

How do you preserve onions in jars?

Wash and peel onions. Cover with boiling water, bring to a boil and boil for 5 minutes. Pack onions into hot jars, leaving 1-inch headspace. Add ½ teaspoon salt to pints or 1 teaspoon to quarts, if desired.

Do caramelized onions expire?

If you’ve made caramelized onions at home, it’s best to use them within 3-4 days. You can also store them in the freezer for up to 3 months for longer shelf life. How do you tell if Caramelized Onions is bad? The telltale signs that caramelized onions have gone bad are a sour smell, moldy patches, or a slimy texture.

Do caramelized onions need to be refrigerated?

This helps give your onions that deep, dark colour and adds so much flavour! Use a large, wide pan. This allows the onions to spread out and cook evenly. You can store caramelized onions in an airtight container in the refrigerator for up to a week.

Does onion help with postrate?

A study conducted on the effect of onion on prostate specific antigen (PSA) showed that administration of onion extract caused a significant decrease in PSA and total acid phosphatase when compared with the control group. This means onion extact can be beneficial in the prevention and treatment of prostate cancer.

Can you freeze caramelized onions?

Frozen caramelized onions keep for a long time. As long as they don’t start to develop freezer burn, frozen caramelized onions will keep for several months. Here are our three favorite ways to freeze the onions. Give one a try! 1. Ice Cube Trays Portion out the onions into ice cube trays and don’t be afraid to pack them in.

Can You caramelize onions?

You can caramelize any type of onion, but the most commonly used (and most versatile) are yellow onions. Sweet onions (vidalia onions) and red onions are delicious caramelized though, so don’t be afraid to experiment. Do you use salt to caramelize onions?

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