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slow cooked caramelized onions
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Slow Cooker Caramelized Onions

Juicy sweet slow cooker caramelized onions require no hovering over the stove, make your house smell divine, and are freezer friendly!
Course Main Dish
Cuisine American, French
Keyword caramelized onions, caramelized onions in slow cooker, crockpot caramelized onions, slow cooker caramelized onions
Prep Time 10 minutes
Total Time 10 hours
Servings 4 cups
Calories 208kcal
Author Kelli Shallal MPH RD

Equipment

Ingredients

  • 5 small sweet or yellow onions
  • 3 tbsp melted butter or oil
  • ½ tsp sea salt

Instructions

  •  Cut the bottom of each onion, remove the papery outside layer, and then slice the onion into ¼-inch strips. Discard the root top of the onion.  
    5 small sweet or yellow onions
    caramelized onion prep
  • Toss sliced onions with melted butter and salt in a slow cooker.  
    5 small sweet or yellow onions, 3 tablespoon melted butter, ½ teaspoon sea salt
  • Place the lid on and cook for 8-12 hours on low. Stirring the onions about halfway through. If lots of liquid accumulates, you can leave the lid ajar to let the steam out for the last two hours of cooking.
  • Onions are done when the desired depth of color and flavor has been reached.  

Video

Notes

*Cooking time will vary depending on the size of the onions. Large onions will take longer than small onions due to sheer volume. Five small onions take around 8 hours, where as five really large onions may take closer to 12 hours.
*Note for crockpots with locking lids, I do not recommend locking the lid in place for this recipe. I did this, and it created WAY to much juice that would have normally evaporated.
*Do not cook on high except for the last hour or two, as a low temperature is vital for caramelization.

Nutrition

Calories: 208kcal | Carbohydrates: 31g | Protein: 3g | Fat: 9g | Saturated Fat: 5g | Polyunsaturated Fat: 0.3g | Monounsaturated Fat: 2g | Trans Fat: 0.3g | Cholesterol: 23mg | Sodium: 391mg | Potassium: 495mg | Fiber: 4g | Sugar: 21g | Vitamin A: 267IU | Vitamin C: 20mg | Calcium: 85mg | Iron: 1mg