Ingredients:

  • 2 lbs Yellow Onions, thinly sliced (910g)
  • 2 tbsp Olive Oil (30ml)
  • 2 tbsp Unsalted Butter (28g)
  • 1/4 cup Brown Sugar, packed (50g)
  • 1/4 cup Balsamic Vinegar (60ml)
  • 1/4 cup Dry Red Wine (60ml) (optional)
  • 1 tbsp Fresh Thyme Leaves (or 1 tsp dried)
  • 1/2 tsp Salt
  • 1/4 tsp Black Pepper

Instructions:

  1. Thinly slice the onions.
  2. Heat olive oil and butter in a large skillet over medium-low heat. Add onions, salt, and pepper.
  3. Cook, stirring occasionally, until onions are deeply golden brown and very soft (45-60 minutes). Reduce heat if needed to prevent burning.
  4. Stir in brown sugar, balsamic vinegar, and red wine (if using).
  5. Simmer, stirring occasionally, until the liquid has reduced and the jam has thickened (about 5-10 minutes).
  6. Stir in fresh thyme leaves.
  7. Let cool slightly before transferring to a sterilized jar. Store in the refrigerator.