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Balsamic Caramelized Onions over pasta
Print Recipe

Balsamic Caramelized Red Onions

Prep Time5 minutes
Cook Time35 minutes
Total Time45 minutes

Ingredients

  • 1 large red onion thinly sliced
  • 1 tablespoon olive oil or butter
  • 1 teaspoon dried herbs rosemary, thyme, Italian seasoning, or Herbs de Provence
  • 1 tablespoon balsamic vinegar
  • Pinch of salt and pepper
  • Optional: splash of water as needed during cooking

Instructions

  • Slice onions into thin, even strips so they cook evenly.
  • Heat olive oil in a large skillet over medium-low. Add the onions and a pinch of salt.
  • Cook for about 10 minutes, stirring occasionally, until onions soften and release moisture.
  • Continue cooking 20–25 more minutes. If the onions begin sticking, add a splash of water to deglaze and prevent burning.
  • Stir in the balsamic vinegar during the last 10 minutes of cooking to deepen the color, sweetness, and tang. Cook until the onions are thick and jammy.
  • Add more salt or vinegar to balance the flavors if needed.