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Instant Pot Caramelized Onions

White bowl with caramelized onions

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4.3 from 9 reviews

Sweet, soft Caramelized Onions, done in a fraction of the time!  Perfect for topping sandwiches, pizzas, salads, and more.

Ingredients

Scale
  • 4 pounds sweet or yellow onions, about 34 large onions
  • 2 tablespoons butter
  • 1/2 teaspoon baking soda
  • 1 teaspoon salt
  • 1/2 teaspoon black pepper

Instructions

  1. Cut the root and top end off of an onion.  Slice the onion in half from top to bottom and remove the peel.  Lay flat side on the cutting board and slice the onion into about 3/4 inch wide moon shapes.  Repeat with remaining onions.
  2. Preheat the pressure cooker by selecting saute.
  3. When hot, add butter.  When butter is melted, bubbling, and starting to brown, add the onions, baking soda, salt, and pepper.
  4. Cook just until onions start to release their juices, 4 – 5 minutes.
  5. Secure the lid and turn pressure release knob to a sealed position.  Cook at high pressure for 4 minutes.
  6. When cooking is complete, use a quick release.
  7. Strain liquid into a separate bowl, leaving the onions in the pressure cooker pot.
  8. Select saute and gently stir the onions to allow excess liquid to evaporate and to let the onions brown a bit more, about 5 minutes.
  9. Use immediately on a salad, sandwich, pizza, etc or refrigerate for up to 5 days.
  10. To freeze, put 1/2 – 1 cup of onions in individual bags, press flat.  When you need caramelized onions to top your dinner, just pull out a single bag and let it thaw for an hour at room temperature or place it in a bowl of warm water for quicker thawing.

Notes

  • Use sweet or yellow onions for the best flavor
  • Cut onions into thick slices to prevent them from becoming too soft while cooking
  • I suggest cooking these outdoors.  It’s quite a fragrant process