Caramelized Onion Jam Will Take Your Burgers to the Next Level

Onion Jam
Photo by Amanda Lim on Unsplash

If sweet and savory is your jam (pardon the pun), this onion jam is something you have to try. The caramelization of the onions adds a sweetness which is offset by the tang of the vinegar. Put the jam on burgers, toast, or serve it with cheese at your next wine night.

Ingredients:

  • ¼ cup extra-virgin olive oil
  • 3 large, sweet onions
  • 2 parsley sprigs
  • 2 bay leaves
  • 1 rosemary sprig
  • 1 cup sugar
  • ¾ cup white balsamic vinegar
  • Salt

Instructions:

  1. Heat the olive oil in a large pot and add the onions which should be diced into ¼-inch pieces. Cook over moderately high heat, stirring occasionally, until they are golden brown. 
  2. Tie the parsley, bay leaves, and rosemary together with kitchen twine. Add the herb bundle to the diced onions and cook over low heat, stirring a few times, until fragrant.
  3. Sprinkle sugar over the onions and cook, without stirring, until the sugar melts.
  4. Increase the heat to high and cook, without stirring, until an amber-brown caramel forms. 
  5. Stir in the white balsamic vinegar and simmer over low heat, stirring a few times, until the jam is thick. Remove the herb bundle. Season the jam with salt and allow it cool. 
  6. Serve warm or at room temperature. The jam can be refrigerated for up to 5 days.