Caramelised Onions
Prep time
Cook time
Total time
A delicious recipe to make your own caramelised onion
Recipe type: Preserve
  • 12 large red (Spanish) onions
  • 3T olive oil
  • ½c brown sugar
  • ½c balsamic vinegar
  • 3 bay leaves
  1. Peel, halve, and slice the onions about 5-7mm thick - too thin will cause the onions to burn. I used a Japanese mandolin because it makes slicing so much faster (and thus less teary), but be careful not to slice your fingers off!
  2. In a large saucepan, heat the oil on a medium heat.
  3. Add the onions and stir regularly for 15 minutes until they are soft and beginning to collapse.
  4. Reduce the heat to low, and with the lid off, add the bay leaves and cook until the onions start to go golden coloured. Stir occasionally. This could take a while.
  5. Add in the brown sugar and balsamic vinegar. Stir until well combined and the sugar dissolves.
  6. Place the lid on and continue to cook on a low heat for 15 minutes before removing the lid again. This allows the vinegar to be taken up by the onion rather than evaporating immediately.
  7. Continue to cook until the onions are a rich, dark brown colour. Remove the bay leaves.
  8. While still hot, spoon into sterilised jars and seal well.
  9. For the best taste, let the onions sit in the jar a couple of weeks to mellow before you serve.
Recipe by Country Life Experiment at