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Caramelized Onions Recipe

Caramelized Onions Recipe


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4.8 from 31 reviews

  • Total Time: 35-45 minutes
  • Yield: 4 1x

Description

Caramelized onions bring rich, deep flavor to dishes that make your taste buds dance with joy. Slowly cooking sliced onions over low heat turns them sweet and golden brown, creating a delicious topping for sandwiches, pizzas, or simply enjoying on their own.


Ingredients

Scale

Main Ingredients:

  • 4 large yellow onions
  • 2 tablespoons olive oil
  • 1 tablespoon unsalted butter

Supporting Ingredients:

  • 1 pinch salt

Flavor Enhancers (Optional):

  • 1 pinch sugar
  • 1 splash balsamic vinegar

Instructions

  1. Slice 4–5 large onions into thin ⅛- to ¼-inch strips using a sharp knife. Keep slices consistent for even cooking.
  2. Select a large stainless steel or cast-iron skillet. Add 2 tablespoons of olive oil or butter at medium heat until shimmering.
  3. Drop all sliced onions into the hot pan. Spread them evenly across the surface, allowing them to start softening.
  4. Reduce heat to medium-low after 5 minutes. Sprinkle a pinch of salt over the onions to help draw out moisture.
  5. Stir onions every 3–4 minutes, ensuring they cook evenly and do not burn. Watch for gradual color transformation from white to golden.
  6. After 20–25 minutes, onions will begin turning deep golden brown. If pan looks dry, add 1–2 tablespoons of water to prevent sticking.
  7. Continue cooking for another 10–15 minutes, stirring frequently. Your onions should reach a rich caramel color and develop a sweet, mellow flavor.
  8. Optional: Add a splash of balsamic vinegar in the final 2 minutes for extra depth and complexity.
  9. Remove from heat when onions are deeply caramelized and soft, approximately 35–40 minutes total cooking time.

Notes

  • Take time when caramelizing onions, as rushing will prevent deep flavor development and proper browning.
  • Use a heavy-bottomed pan to ensure even heat distribution and prevent burning during the long cooking process.
  • Slice onions consistently to help them cook evenly, aiming for ⅛- to ¼-inch thick pieces for best texture.
  • Salt and optional sugar can enhance the natural sweetness and help break down the onions more quickly.
  • Prep Time: 5 minutes
  • Cook Time: 30-40 minutes
  • Category: Sautéed
  • Method: Sautéing
  • Cuisine: French

Nutrition

  • Serving Size: 4
  • Calories: 120 kcal
  • Sugar: 7 g
  • Sodium: 150 mg
  • Fat: 7 g
  • Saturated Fat: 1 g
  • Unsaturated Fat: 6 g
  • Trans Fat: 0 g
  • Carbohydrates: 15 g
  • Fiber: 2 g
  • Protein: 1.5 g
  • Cholesterol: 0 mg