Caramelized Onion Jam
Caramelized Onion Jam is a rich, sweet, and savory spread made with slowly cooked onions, brown sugar, balsamic vinegar, and simple seasonings. The onions become soft and deeply caramelized, creating a delicious mixture with a wonderful balance of sweetness and tanginess.

This versatile recipe works beautifully with burgers, sandwiches, grilled meats, cheese boards, toasted bread, and crackers. It is also a great make ahead condiment for gatherings and special meals.
Ingredients List
Serving, Prep Time, Cooking Time, Calories
Servings: 12
Prep Time: 10 minutes
Cooking Time: 45 minutes
Total Time: 55 minutes
Calories: Approximately 85 calories per serving
Why You Will Love This Recipe
Sweet and Savory Flavor
Slowly caramelized onions develop a naturally sweet flavor that pairs beautifully with tangy balsamic vinegar and savory seasonings.
Easy to Make
The recipe uses simple ingredients and requires only gentle cooking to transform the onions into a rich spread.
Versatile Condiment
Use it on burgers, sandwiches, toast, grilled chicken, steak, cheese boards, or crackers.
Make Ahead Friendly
Caramelized onion jam can be prepared ahead of time and stored in the refrigerator for convenient serving.
Step By Step Instructions
Slice the Onions
Peel the onions and slice them thinly and evenly. Thin slices help the onions cook more consistently.
Start Cooking the Onions
Heat the butter and olive oil in a large skillet over medium low heat.
Add the sliced onions and salt. Stir gently to coat the onions with the butter and oil.
Slowly Caramelize the Onions
Cook the onions over medium low heat for about 25 to 30 minutes. Stir every few minutes to prevent them from sticking or browning too quickly.
The onions should become very soft and golden brown.
Add the Sweet Ingredients
Add the brown sugar and stir well. Continue cooking for about 3 minutes until the sugar melts into the onions.
Add the Vinegar
Pour in the balsamic vinegar and water. Add black pepper, thyme, and Worcestershire sauce.
Stir everything together and continue cooking for another 10 to 15 minutes.
Thicken the Jam
Continue cooking until most of the liquid has reduced and the onions become glossy and thick.
Avoid cooking over high heat because the sugar can burn.
Cool and Serve
Remove the skillet from the heat and allow the onion jam to cool slightly.
Transfer it to a clean container and serve warm or chilled.

Variations To Try
Apple Onion Jam
Add finely diced apple during the final stages of cooking for extra sweetness and a fruity flavor.
Bacon Onion Jam
Add finely chopped cooked bacon for a smoky and savory variation.
Spicy Onion Jam
Add a small amount of red pepper flakes for a gentle spicy flavor.
Garlic Onion Jam
Add minced garlic during the final few minutes of cooking for an extra savory taste.
Herb Onion Jam
Add fresh rosemary or thyme for a fragrant herbal flavor.
Freezing Or Restoring
Freezing
Allow the onion jam to cool completely before transferring it to a freezer safe airtight container.
Freeze for up to 2 months for the best quality.
Reheating
Thaw the jam in the refrigerator overnight. Reheat gently in a small saucepan over low heat.
Add a splash of water if the jam becomes too thick during reheating.
Recipe Notes
Cook the onions slowly over medium low heat for the best caramelized flavor.
Stir occasionally rather than constantly so the onions have enough time to develop their golden color.
Keep the heat low after adding the sugar because it can burn quickly.
Fresh onions work best for this recipe. Yellow onions provide a balanced flavor, while sweet onions create a slightly sweeter jam.
Store leftover onion jam in an airtight container in the refrigerator and use a clean spoon when serving.
FAQs
What can I serve with Caramelized Onion Jam?
It is delicious with burgers, sandwiches, grilled meats, toasted bread, crackers, and cheese boards.
Can I use red onions?
Yes. Red onions work well and will give the jam a slightly different flavor and deeper color.
Why are my onions not caramelizing?
The heat may be too low or the pan may be crowded. Continue cooking patiently and stir occasionally.
Can I make this without balsamic vinegar?
Yes. You can substitute apple cider vinegar or another mild vinegar, although the flavor will be slightly different.
How long does onion jam last?
Keep it refrigerated in an airtight container and use it within several days for the best quality.
Can I make onion jam ahead of time?
Yes. Making it ahead allows the flavors to develop and makes it convenient for entertaining.
Conclusion
Caramelized Onion Jam is a flavorful condiment that transforms simple onions into a rich, glossy, sweet, and savory spread. Slow cooking brings out the natural sweetness of the onions while balsamic vinegar adds a pleasant tangy balance.
Serve it with burgers, sandwiches, grilled meats, cheese, crackers, or warm bread. It is an easy recipe that adds an impressive homemade touch to everyday meals and special gatherings.
Caramelized Onion Jam
Course: Appetizers12
servings10
minutes45
minutes85
kcalIngredients
3 large yellow onions, thinly sliced
• 2 tablespoons butter
• 1 tablespoon olive oil
• 1/3 cup packed brown sugar
• 1/4 cup balsamic vinegar
• 2 tablespoons water
• 1/2 teaspoon salt
• 1/4 teaspoon black pepper
• 1/2 teaspoon fresh thyme leaves
• 1 teaspoon Worcestershire sauce
Directions
- Heat the butter and olive oil in a large skillet over medium low heat.
- Add the sliced onions and salt. Stir to coat the onions evenly.
- Cook the onions over medium low heat for about 25 to 30 minutes, stirring occasionally, until they become very soft and golden brown.
- Add the brown sugar and stir well. Cook for about 3 minutes until the sugar melts.
- Add the balsamic vinegar, water, black pepper, thyme, and Worcestershire sauce. Stir until everything is well combined.
- Continue cooking for 10 to 15 minutes, stirring occasionally, until most of the liquid has reduced and the onions become thick and glossy.
- Remove from the heat and allow the onion jam to cool slightly.
- Transfer to a clean airtight container and serve warm or chilled
Recipe Video
Notes
- Cook the onions slowly over medium low heat for the best caramelized flavor. Avoid using high heat after adding the brown sugar because it can burn quickly. The jam will become thicker as it cools. Store leftovers in an airtight container in the refrigerator and use a clean spoon when serving.







