Caramelized Onion



Caramelized onion is a delightful sweet and sour preparation that can be enjoyed in a thousand different ways. Its versatility makes it perfect to be served as an appetizer, accompanied by slices of toasted bread, but it can also become that tantalizing and refined touch that makes a dish appetizing, like these spaghetti tomato and caramelized onions or the seared scallops with caramelized onion. To make this recipe, we recommend preferring red onions, characterized by a marked sweetness; even better if you have a product of excellence like the famous Calabrian red onions, with which the caramelized Tropea onions are prepared.

Discover here other delicious ideas for cooking onions:

  • Red onion compote
  • Piadina with taleggio and caramelized onions
  • Baked onions
  • Onion soup
Red onions 4
Balsamic vinegar 1.8 oz (50 g)
Brown sugar 1 spoonful
Butter to taste
Fine salt to taste

How to prepare Caramelized Onion

To prepare the caramelized onion, peel the red onions 1 and slice them thinly 2. In a pan, put a generous knob of butter 3.

Melt it over low heat and then add the onions 4 with the brown sugar 5 and balsamic vinegar 6.

Add a pinch of salt 7 and cook for 20 minutes on low heat or for the necessary time to soften the onions 8. The caramelized onion is ready to enjoy 9.

How to store

The caramelized onion can be stored in the refrigerator for 3-4 days, sealed in an airtight container.

It can be frozen after cooking.


If the onions should dry out too much during cooking, you can add a little hot water and cover them with the lid.