
Onion Jam is a slow-cooked preserve that transforms humble onions into a rich, glossy condiment with remarkable depth. As the onions gently soften and caramelize, their natural sweetness intensifies, balanced by savory notes and a subtle touch of acidity. The result is tender, spreadable, and complex, with layers of buttery richness, mellow allium flavor, and a lingering finish on the palate. Spoon it onto a cheeseboard, tuck it into a grilled cheese sandwich, or serve it alongside roasted meats to add warmth and contrast. Sweet without being cloying and savory without becoming heavy, onion jam brings a polished, versatile character to both simple snacks and elaborate dishes.
Ingredients
- 2 tablespoons olive oil
- 3 large, sweet onions, cut into 1/4-inch dice
- 2 parsley sprigs
- 2 Fresh Thyme sprigs
- 1 fresh rosemary sprig
- 1 cup sugar
- 3/4 cup white balsamic vinegar
- ½ teaspoon of Kosher salt
Process
- Heat the olive oil in a large pot over medium heat until it shimmers. Add the onions and cook over medium heat, stirring occasionally, until golden brown, about 15 minutes.
- Tie the parsley, thyme, and rosemary with kitchen twine. Add the herb bundle to the diced onions. Cook over low heat, stirring a few times, until fragrant, about 3 minutes.
- Sprinkle the sugar over the onions and cook, without stirring, until the sugar melts, for about 5 minutes.
- Turn the heat to high and cook without stirring for about 6 minutes, until the caramel turns amber brown. Then reduce the heat to low.
- Stir in the white balsamic vinegar. Simmer over low heat for about 5 minutes, stirring occasionally, until the jam thickens and the vinegar is absorbed. Remove the herb bundle. Season with salt and let the jam cool until warm.
Note: The caramelized onion jam can be refrigerated for up to five days. Serve warm or at room temperature.
08/01/2026

