This rich caramelized onion jam with balsamic vinegar and chili is the best sweet, savory, and deeply flavorful condiment. Easy and delicious!
The Best Caramelized Savory Onion Jam Condiment
There are few things in the kitchen more magical than the slow transformation of onions in a pan. What begins sharp and humble gradually melts into something deep, rich, and almost buttery as the natural sugars caramelize. The aroma alone is enough to draw everyone into the kitchen.
This caramelized onion jam with balsamic vinegar and chili takes that simple transformation one step further. Sweet onions cook slowly until they become dark, glossy, and intensely flavorful, then balsamic vinegar adds a gentle tang while a touch of chili brings just enough warmth to wake everything up.
The result is a savory onion jam that walks the perfect line between a sweet, tangy, and subtly spicy condiment.
What Is A Caramelized Onion Condiment?
What is an onion jam you ask? I thought a jam was sweet! Well, aren’t onions? Yes in deed they are. The sugar that’s released from onions, when they are sautéed, adds so much flavor to many recipes. Add an extra sweetness from maple syrup and a sprinkle of brown sugar, counter that umami with a drizzle of balsamic and you’ve got a luscious sweet and sour jam.
Caramelized onion jam is a rich, savory spread made by slowly cooking onions until they become deeply golden and sweet, then finishing them with ingredients like balsamic vinegar, sugar, herbs, or spices.
As onions cook low and slow, their natural sugars caramelize, transforming their sharp bite into something mellow, jammy, and almost buttery in texture. A splash of balsamic vinegar adds acidity and depth, while a touch of chili brings a gentle warmth that balances the sweetness.
The result is a savory onion spread that behaves much like a chutney or relish, favored condiments, intensely flavorful and perfect for adding depth to simple dishes.
Homemade balsamic onion jam is especially beloved for cheese boards, sandwiches, burgers, roasted vegetables, and grilled meats.
For The Love Of Condiments
A savory jam on a cheese board adds deep flavor to your favorite cheese selections.
A great condiment to spread over a puff pastry baked with brie or goat cheese inside, or over a simple grilled cheese sandwich, or cheese filled crepe, for that matter.
Keeping a savory preserve tucked away in the fridge, means last minute appetizers can be quick and satisfying. A savory caramelized onion jam definitely brings an umami addition to whatever you serve it with, or on.
What Are The Best Onions For An Onion Jam?
The types of onions used to make a great onion jam, are not as important as knowing that you simply need lots of onions! As a large mound of onions cook, they shrink down, become caramelized, and their sweet juices will thicken, just as sugar does. If yellow onions, white onions, or a variety of hodge-podge onions are what you have on hand, they will work just fine.
- Yellow onions – These are the most versatile choice. They caramelize beautifully and create a balanced sweet-savory flavor.
- Sweet onions – Varieties like Vidalia produce an especially mellow, almost buttery onion jam.
- Red onions – Red onions can also be used, creating a slightly deeper color and subtle sweetness.
Once the onions caramelize and the additional ingredients are added, you will have a rich thick onion jam, no matter the type of onions used. This balsamic onion jam recipe is a simple recipe that is easy, and cooked in about 20-minutes.
Chili Peppers For A Hot Sweet Jam
If the words you are now reading could have an emoji, I would definitely have a spark of fire right here! Do you like heat in your food? Ghost peppers rank wayyyyy up there in the heat index, like, one-million scovilles (measurement of heat)!
I grow scotch bonnets in my garden every year, and am still learning ways to use them. However, when I treat them the same as I do my Homemade Smoked Paprika – grow, smoke, dehydrate and grind to a powder – they are just as hot as Ghost chilies!
Homegrown chili peppers of any variety are delicious in this onion jam condiment, it just depends on the flavor you prefer in your peppers, and the level of heat.
Gloves Are A Must When Working With Chilies
We can not talk about chopping onions, garlic and hot peppers without talking about wearing gloves when you chop, food safe gloves, that is!
Look, I wear contact lens, and if I chop chili peppers without gloves, I have to do a scream, song, and dance trying to get the contacts out with fingers that touched chili’s HOURS AGO!
Wear gloves when working with chilies, even when picking them from your garden.
Calling All Gardeners!
If you grow onions in your garden, this caramelized onion jam is one of the most delicious ways to preserve their harvest. A few humble onions slowly transformed into something rich, savory, and unforgettable.
Don’t forget to plant a few types of hot chilies early in the spring so they will be ready to harvest when your onions are ready.
For lots more garden to table recipes, or Dirt to Dish, as I was inspired to publish over 100 recipes from easy to grow, seasonal favorites in pots or a garden, you might enjoy my book!
What’s The Big Deal About Onion Jam
Something luscious happens in the pan when slow simmering onions, sugar and vinegar. If onions had eyes, they would take on a glassy glare, in this concoction.
This version of balsamic caramelized onion jam has layers of flavor that go far beyond the traditional recipe.
The sweetness of slow-cooked onions is enhanced with brown sugar and pure Vermont maple syrup, creating a gentle, earthy sweetness. Balsamic vinegar adds brightness and depth, while smoked chili powder and ghost pepper introduce just enough warmth to make the flavors linger.
The result is a savory onion jam that is sweet, tangy, smoky, and slightly spicy all at once. How to use onion jam with heat? Try a schmear on everything!!
So Many Ways To Use Caramelized Onion Jam – Especially With Added Chili Heat
I’ve simmered beef or lamb in it, or spread it on grilled burgers, which provides so much flavor, little else was needed.
Definitely a great addition to spread on top a small wheel of brie baked in phyllo or a pastry dough.
If you are like me and love a great onion soup, especially given its powerful health benefits, then the addition of this onion jam will quick turn that soup into a lovely French onion soup, needing only a crusty loaf of bread.
However, my favorite way, so far, has been the spunk it brings to boring vegetables! In fact, I first created this recipe to serve with my (also new creation) Onion Jam Brussels Sliders, now my favorite way to eat Brussels sprouts!
How To Make Caramelized Onion Chili Jam
This jam couldn’t be easier to make. No special equipment is needed, simply a sharp knife and a saute pan.
- Slicing the onions as thin as possible, helps to evenly cook when they are heaped into the pan.
- Once the onions are sliced, chop a little garlic and some fresh herbs to toss in for added flavor. I used thyme but any fresh herb of your choice adds brightness to the jam.
- Saute the heap of onions in a pat of butter with a drizzle of olive oil, a bit of sugar, a drizzle of maple syrup and add the heat of chili peppers or flakes.
The processing time is fast, and the medium heat cook time is about 20 minutes to produce the best homemade onion jam. If some of the onions cook too fast, while others are still caramelizing, simply add a little water to the bottom of the pan to keep them from burning.
Once the jam cools to room temperature, it is ready to serve, be stored in an airtight container in the fridge, or freeze in small batches in ice cube trays for a quick flavoring in soups and stews.
Tips for Perfect Caramelized Onions
The secret to a truly rich caramelized onion jam lies in patience. Slowly cooking onions allows their natural sugars to develop deep color and flavor.
Cook Low and Slow – Caramelization takes time. Cooking onions over medium-low heat allows them to soften gradually and develop their signature sweetness without burning.
Stir Occasionally, Not Constantly – Give the onions time to rest against the pan between stirs. This helps them develop those beautiful golden edges that bring depth to the jam.
Don’t Rush the Color – Properly caramelized onions should be deep golden brown and glossy, not pale and soft. This transformation is what gives onion jam its remarkable flavor.
Deglaze for Extra Flavor -As the onions cook, flavorful browned bits form on the bottom of the pan. When you add balsamic vinegar, it loosens these bits and incorporates them into the jam, adding incredible richness.
Ingredients for Caramelized Onion Jam
One of the beautiful things about a homemade caramelized onion jam condiment is that it transforms a handful of humble ingredients into something deeply rich and complex. Each ingredient plays a small but important role in building layers of flavor.
- Onions – Onions are the heart of this recipe. As they cook slowly over gentle heat, their natural sugars caramelize, transforming their sharp bite into something soft, sweet, and deeply savory. Yellow onions work beautifully here, though sweet onions can make the jam even more mellow and rich.
- Butter – A little butter adds warmth and richness as the onions begin to cook. It helps soften their texture and brings a subtle depth that makes the finished onion jam taste luxurious.
- Good quality Extra Virgin Olive Oil – Helps the onions cook evenly while adding its own gentle fruitiness. The combination of butter and olive oil gives the jam a beautifully balanced base.
- Brown sugar – Brown sugar enhances the onions natural sweetness and helps encourage caramelization. Its molasses notes add a subtle depth that pairs especially well with balsamic vinegar.
- Maple syrup – good quality Vermont Maple syrup – Brings a delicate earthy sweetness that feels more nuanced than sugar alone. It rounds out the flavors and adds a whisper of warmth that makes this onion jam especially memorable.
- Garlic – Garlic adds a savory backbone that keeps the jam from becoming too sweet. As it cooks with the onions, it softens into a mellow, aromatic layer of flavor.
- Balsamic vinegar – Brightens the jam and balances the sweetness of the onions and maple syrup. Its tangy richness is what gives balsamic onion jam its signature depth.
- Smoked chili powder – Smoked chili powder adds a subtle smokiness and gentle warmth that complements the sweetness of the caramelized onions beautifully.
- Salt – Salt sharpens and balances all the flavors, allowing the sweetness, acidity, and spice to work together.
- Ghost pepper powder, or red chili flakes – For those who enjoy a touch of heat, a pinch adds a bold, lingering warmth. For a milder version, red chili flakes provide just enough gentle spice without overwhelming the jam.
Tools You’ll Need
Making caramelized onion jam condiment requires only a few basic kitchen tools. The magic comes from slow cooking and good ingredients, not complicated equipment.
- Saute pan – A wide saute pan works best because it gives the onions plenty of room to cook evenly and caramelize properly. The more surface area the onions have, the better they will brown and develop deep flavor.
- Slotted spoon – A slotted spoon makes it easy to stir the onions as they cook and helps lift them gently if you need to move them around the pan.
- Cutting board – A sturdy cutting board gives you plenty of space to slice your onions safely and comfortably.
- Chopping knife – A sharp knife is essential for slicing the onions evenly so they cook at the same rate and caramelize beautifully.
- Airtight jar – Mason jars are always my go-to for an airtight container – Once cooled, store the onion jam in an airtight glass jar. Mason jars are always my go-to because they seal well and keep the jam fresh in the refrigerator while allowing the flavors to deepen over time.
- Measuring tools – Measuring spoons and cups help keep the balance of sweetness, acidity, and spice just right.
- Stovetop or burner – All that’s required is a steady burner and a little patience while the onions slowly transform into a rich, jammy condiment.
Caramelized Onion Jam – Balsamic and Chili
Equipment
- Saute pan
- Airtight container
Ingredients
- 4 Large onions red onions or other sweet onions
- 4 tbsp Unsalted butter
- 1 tbsp Extra virgin olive oil
- 1/3 cup Brown sugar or cane sugar
- 3 tbsp Maple syrup
- 3 Garlic cloves crushed
- 3 tbsp Balsamic vinegar
- 1 tbsp Apple cider vinegar
- 2 tsp Smoked chili powder
- 1/2 tsp Dried thyme
- 2 tsp Kosher salt
- pinch Ghost chili or red pepper flakes at your own risk!
Instructions
- On a cutting board with a sharp knife, or a food processor fitted with a slicer, thinly slice the onions.
- In a large skillet over medium-high heat, melt the butter along with the olive oil.Cover the bottom of the pan with onions.
- Add the remaining ingredients, turn down to medium heat and cook until the onions are golden brown, about 20-minutes. Good caramelized onions should glisten and begin to look like a delicious jam.
- While different flavors can be added to the caramelized onion jam, the best flavor will come from a hint of sweetness from the onions, and the tartness of the balsamic vinegar.
- Cool to room temperature and store in a glass jar or airtight container in the fridge for about a week.
Video
Notes
- A great way to extend the life of this red onion jam, small amounts can be frozen in ice cube trays, once frozen, store the cubes in an airtight container to thaw and use at another time.
I believe the table... that place that draws people to gather, is the most powerful symbol of togetherness. All that happens before the table is set, the planning, the gathering, the preparing, are all an intricate part of the dance that create the mood of celebration to share with friends and loved ones.