Caramelised Onions

Perfectly golden and tender onion rounds, slowly cooked to enhance their natural sweetness and develop a rich, deep flavor. These caramelised onions are a versatile addition to any meal, ideal for topping burgers, steaks, or serving as a flavorful side dish.

Why You’ll Love This Recipe

Caramelised onions are simple to prepare yet deliver exceptional taste that can elevate a variety of dishes. Cooking the onions slowly allows their natural sugars to develop, resulting in a sweet, savory flavor with a soft, melt-in-your-mouth texture. This recipe requires just a handful of ingredients and is ready in about 20 minutes, making it both convenient and impressive.

Ingredients

(Tip: You can find the complete list of ingredients and their measurements in the recipe card below.)

3 large onions, peeled and sliced into thick rounds
2 tablespoons olive oil
1 tablespoon butter (optional for extra richness)
1/2 teaspoon salt
1/4 teaspoon black pepper
1 teaspoon balsamic vinegar (optional for added depth)

Directions

1. Heat the olive oil (and butter if using) in a large skillet over medium-low heat.
2. Add the onion rounds carefully, keeping them intact. Season with salt and black pepper.
3. Cook undisturbed for 5-7 minutes until golden on the bottom.
4. Flip the onion rounds gently and continue to cook for another 5-7 minutes, until caramelised and tender.
5. Drizzle with balsamic vinegar if using, and cook for an additional 1-2 minutes.
6. Serve warm as a topping or side.

Servings and timing

This recipe yields 4 servings.
Prep time: 5 minutes
Cooking time: 15 minutes
Total time: 20 minutes
Calories: approximately 110 kcal per serving

Variations

• Add a pinch of sugar to enhance sweetness if desired.
• Use red onions for a slightly different flavor and color.
• Replace balsamic vinegar with a splash of red wine or sherry vinegar for variation.
• Include fresh thyme or rosemary during cooking for an herbed note.
• For a smoky twist, add a dash of smoked paprika.

Storage/reheating

Store caramelised onions in an airtight container in the refrigerator for up to 4 days.
Reheat gently in a skillet over low heat until warmed through, or microwave briefly. These onions can also be frozen for up to 2 months; thaw in the refrigerator before reheating.

FAQs

Can I slice the onions differently for this recipe?

Yes, you can slice the onions into half-moons or strips if you prefer them in smaller pieces rather than rounds.

Why cook the onions over medium-low heat?

Low heat allows the onions to soften and caramelise slowly without burning, developing their natural sweetness.

Can I use only oil or only butter?

Yes, either works well on its own, though the combination offers both flavor and a higher smoke point.

How do I prevent the onions from burning?

Cook over low heat, avoid overcrowding the pan, and resist the urge to stir too often.

What dishes pair well with caramelised onions?

They are excellent on burgers, steaks, sandwiches, pizzas, or stirred into pasta and grain bowls.

Can I make these onions ahead of time?

Yes, caramelised onions keep well and can be prepared ahead for easy use in various dishes.

Is balsamic vinegar necessary?

No, it is optional, but it adds depth and a slight tang that enhances the flavor.

How do I make the onions extra soft?

Cook them a little longer at a lower temperature, adding a splash of water if the pan dries out.

Can I use sweet onions for this recipe?

Yes, sweet onions like Vidalia or Walla Walla will caramelise beautifully and develop an even richer flavor.

How do I get an even golden color on the onions?

Allow the onions to cook undisturbed on each side for several minutes before flipping gently.

Conclusion

Caramelised onions are a simple, flavorful addition that can transform everyday dishes into something special. With minimal ingredients and effort, you can create a versatile topping or side that delivers rich, sweet, and savory notes. Enjoy these golden onions warm, and discover just how much they enhance your favorite meals.

Print