Caramelized Onion Jam

Why You’ll Love This Recipe

Caramelized Onion Jam is a savory-sweet condiment that brings rich, deep flavor to everything from burgers and sandwiches to cheese boards and roasted meats. Made by slowly cooking onions with a touch of sugar, vinegar, and spices, this jam offers a balance of umami, sweetness, and tang that elevates everyday meals into gourmet delights.

ingredients

this Recipe

(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)

yellow or sweet onionsolive oilbutterbrownsugarthyme or rosemary (optional)balsamic vinegarapple cider vinegar or red wine vinegarsaltpepper

directions

Thinly slice the onions evenly to ensure consistent cooking.

In a large skillet or saucepan, heat olive oil and butter over medium heat.

Add the onions and a pinch of salt, and cook, stirring often, for 10–15 minutes until softened.

Reduce the heat to low and continue to cook, stirring occasionally, for 30–40 minutes until onions are golden brown and caramelized.

Stir in brown sugar, balsamic vinegar, and apple cider vinegar.

Add herbs if using and simmer for an additional 10–15 minutes until the mixture is thick and jammy.

Season with salt and pepper to taste.

Let cool slightly, then transfer to jars or containers.

Servings and timing

This recipe yields approximately 2 cups.Preparation time: 10 minutesCooking time: 60–70 minutesCooling time: 10 minutesTotal time: 80–90 minutes

Variations

Use red onions for a deeper color and sharper flavor.

Add a splash of port or red wine for complexity.

Include garlic for an aromatic boost.

Spice it up with a pinch of chili flakes or smoked paprika.

Mix in a little Dijon mustard for a tangy edge.

storage/reheating

Store in an airtight container or jar in the refrigerator for up to 2 weeks.Freeze for up to 3 months—thaw in the fridge before using.To reheat, gently warm in a skillet over low heat or microwave in small bursts.

FAQs

Can I can this onion jam?

Yes, if you follow proper sterilization and canning procedures for acidic foods.

Is it very sweet?

It has a balanced sweetness—adjust sugar to your taste.

Can I use white sugar?

Yes, but brown sugar adds richer flavor.

Do I need both vinegars?

Using both adds depth, but you can stick to one if preferred.

What can I serve it with?

Try it on burgers, toast, grilled cheese, or as part of a charcuterie board.

Can I make it vegan?

Yes, just omit the butter or use a plant-based alternative.

Is it supposed to be thick?

Yes, it should have a spreadable, jam-like consistency.

How do I avoid burning the onions?

Keep the heat low and stir regularly—patience is key.

Can I double the recipe?

Absolutely, just use a larger pan and extend cooking time slightly.

Does it taste like traditional jam?

No, it’s savory with a hint of sweetness—not sugary like fruit jam.

Conclusion

Caramelized Onion Jam is a versatile, gourmet condiment that brings depth and richness to a variety of dishes. With its robust flavor and luscious texture, it’s an easy way to enhance everyday meals or impress guests at special gatherings. Once you try it, you’ll find endless reasons to keep a jar on hand.

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