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Crockpot Onion Boil Recipe: Easy, No-Fuss Caramelized Onions
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Crockpot Onion Boil Recipe: Easy, No-Fuss Caramelized Onions

Prep Time10 minutes
Cook Time5 hours
Total Time5 hours 10 minutes
Servings: 6 servings
Calories: 170kcal

Ingredients

  • 3 large onions, sliced into thick crescents
  • 2 tbsp olive oil or butter
  • 1 tsp salt (adjust to taste)
  • 1/2 tsp sugar (optional, for extra caramelisation)
  • 1/2 cup beef or vegetable broth (or water, if you’re feeling minimalist)
  • 1 tbsp balsamic vinegar or a splash of apple cider vinegar
  • optional garlic powder, black pepper, or fresh herbs for finishing

Instructions

  • Prep your onions: peel, slice into thick crescents, and give them a little massage with olive oil. It’s onion therapy; embrace it.
  • Season them: sprinkle salt and a touch of sugar. This is the moment your onions decide to be sweet, not sulky.
  • Sizzle before slow: toss the onions into a hot skillet for 5 minutes to start browning. No need to overdo it — you’re just waking them up.
  • Dump and mingle: transfer the onions to the Crockpot. Add broth and vinegar. Stir once to coat, then leave them be.
  • Low and slow: cook on low for 6–8 hours, or 4–6 hours on high. You’ll know they’re ready when they’re deeply golden and jammy, and your kitchen smells like pure comfort.
  • Finish with flair: taste and adjust salt. If you want, sprinkle garlic powder or pepper and a quick pinch of fresh herbs right before serving.