Caramelized Onion Jam Recipe

Looking for a unique treat? Try making some carmelized onion jam. We've got just the recipe for you in this article. You'll love it!
Caramelized Onion Jam Recipe
Valeria Sabater

Written and verified by psychologist Valeria Sabater.

Last update: 27 May, 2022

Onion jam is a perfect side to spice up your regular dishes and it goes perfectly with your starters, steaks, fish, and, of course, cheeses. This jam is an easy way to liven up your cooking.

In this article, we’ll take a look at a recipe to make a sweet onion jam. It’s easy to cook and will give your dishes that extra innovative touch.

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The Benefits of Onion Jam

Here are just some of the many amazing benefits of onions:

  • They have antianemic properties: Onions are an excellent source of iron, phosphorus and vitamin E. Thus, they help the body maintain and make red blood cells.
  • Onions are diuretic with cleansing properties. Thanks to their high potassium content, onions help with water retention and regulating high blood pressure.
  • They’re a great source of vitamin B. Onions are a wonderful source of vitamin B and magnesium. Thus, they help both the nervous and muscular systems. They’re simple source of energy which will help improve our day to day.
  • Onions have antioxidant properties. Thanks to the vitamin A and C found in onions and their flavanoids, we get a good dose of antioxidants.
  • They help with constipation. In addition, onions are good for constipation and regulating the digestive system.

Onion Jam Recipe

onion jam

Read: Three Fast and Nutritious Chicken Recipes

Onion jam is surprisingly easy to make.

The first thing you should do is get a few Mason jars to store it when you’re done. This recipe is to make a hefty two pounds of jam, so calculate how many you’ll need so you can pull it off the shelf and eat it whenever you want.

It’s better to roast the onion in the oven than by boiling it in water. The taste will be more distinctive. However, either way is fine. Some people even like to charbroil them. That’s up to you.


  • 2 pounds of green onions
  • 1 pound of sugar


  1. First, line the oven tray with aluminium foil.
  2. Peel the onions and wash them. Put them on the tray, drizzle them with olive oil and add a pinch of salt.
  3. Then, set the oven to 390º F and cook the onions 35-40 minutes. Turn them from time to time to make sure they’re roasting through.
  4. Take your roasted onions out of the oven and let them cool off for a few minutes.Meanwhile, fill a pot with three cups of water and the pound of sugar or sugar substitute.
  5. Then, add the roasted onions to the pot and cook them on medium high for 30 minutes.
  6. Stir constantly to make sure they don’t burn or stick to the bottom. The mixture will thicken slowly and caramelize, turning a dark brown and start smelling delicious. Make sure they don’t burn: if they burn just the tiniest bit they’ll turn the whole pot’s taste.
  7. Let the mixture sit for ten minutes. During that time, it will thicken some more.
  8. Then, you can start pouring the jam into the jars.
  9. If you want to keep them stored, you can heat them in boiling water to seal them. Once you’ve sealed them tightly, place them carefully in a pot with water. After you hear the canning “pop,” that means they’re set!

Enjoy Your Jam

This is a recipe for sweet caramelized jam. However, there are other versions. Some people like to use balsamic vinegar, butter and half a pound of brown sugar with the same amount of onions or even add a touch of honey.

Our way is much simpler and the characteristic roasted taste will come through with every bite. If you like mixing sweet and savory, trying out different flavors, this is the recipe for you!

Try it as a spread on whole wheat crackers. A slice of goat cheese and a spoonful of onion jam is a delicious and original appetizer that will impress any guest.

All cited sources were thoroughly reviewed by our team to ensure their quality, reliability, currency, and validity. The bibliography of this article was considered reliable and of academic or scientific accuracy.

This text is provided for informational purposes only and does not replace consultation with a professional. If in doubt, consult your specialist.