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The Ultimate Guide on How to Caramelize Onions

🧅 The Ultimate Guide on How to Caramelize Onions — Rich, Golden, and Irresistibly Sweet!

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Prep Time 10 minutes
Cook Time 50 minutes
Servings: 1
Calories: 40
Ingredients Method Notes

Ingredients
  

  • 2 –3 large yellow onions or sweet onions, thinly sliced
  • 1½ tbsp olive oil or unsalted butter, or a mix of both
  • Pinch of salt
Optional:
  • 1 tsp sugar to enhance sweetness, splash of balsamic vinegar (for depth), or a dash of water if onions begin to stick

Method
 

Prepare the Onions:
  1. Slice onions evenly into thin half-moons or rings to ensure even cooking.
Heat the Pan:
  1. In a large skillet or sauté pan, heat olive oil or butter over medium-low heat.
Add the Onions:
  1. Add sliced onions to the pan and stir to coat them in the oil. Sprinkle with a pinch of salt.
Slow Cook, Stir Often:
  1. Cook onions over medium-low heat, stirring every 5–10 minutes. They’ll first soften, then begin to brown. Resist the urge to raise the heat!
Adjust as Needed:
  1. If onions stick or brown too quickly, lower heat and add a tablespoon of water to deglaze the pan. Optional: add sugar after 20 minutes for a sweeter finish.
  2. Finish with Depth (Optional):
  3. When onions are deeply golden brown and jammy (around 45–60 minutes), you may stir in a splash of balsamic vinegar for added flavor.
  4. Cool & Store:
  5. Let cool and store in an airtight container in the fridge for up to 5 days or freeze for up to 3 months.

Notes

Use a wide, heavy-bottomed pan to prevent crowding (which leads to steaming rather than browning).
Don’t rush the process — low and slow is key to true caramelization, not just browning.
Great for topping burgers, pizzas, sandwiches, steak, or folding into dips and pasta.
For large batches, use 4–5 onions and cook in two pans or in batches.