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How To Caramelize Onions

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Course homemade ingredient
Cuisine universal
Keyword caramelize onions, caramelized onions, caramelizing onions, French onion soup onions, how to
Prep Time 5 mins
Cook Time 45 mins
Total Time 50 mins
Servings 1 cup
Calories 692
Author Laurie McNamara


  • 4 tablespoons unsalted butter
  • 2 pounds sweet onions or onions of your choice, slice 1/4-inch thick
  • 3/4 teaspoon kosher salt


  • Melt butter in a large pan over medium-high heat.
  • Once the butter has melted, add in the onions to the pot with 3/4 teaspoon kosher salt and toss. It should start to sizzle.
  • Toss the onions in the butter, cover and cook undisturbed for 5 minutes.
  • After the 5 minutes, remove the lid and cook on medium-low heat for 40 minutes, stirring every 5 minutes. I literally set a timer and stir every 5 minutes.
  • After 20 minutes, you should noticed the onions start turning a deep golden color and smell insanely good!!
  • Then, after 40 to 45 minutes (total) the onions should be ultra tender and a deeply rich golden amber color.


Depending on the recipe you’re making will decide how many onions to use. Typically I use 2 pounds onions, because they shrink. However, my rule is to use 1 tablespoon of butter per large sweet onion.


Serving: 1g | Calories: 692kcal | Carbohydrates: 69g | Protein: 8g | Fat: 46g | Saturated Fat: 29g | Polyunsaturated Fat: 2g | Monounsaturated Fat: 12g | Trans Fat: 2g | Cholesterol: 120mg | Sodium: 1823mg | Potassium: 1093mg | Fiber: 8g | Sugar: 46g | Vitamin A: 1409IU | Vitamin C: 44mg | Calcium: 196mg | Iron: 2mg