VIDEO: How to Make Caramelized Onions in the Oven

Ever wonder how to make delicious, flavorful caramelized onions? This tutorial will take out all of the hard work by showing you how to make caramelized onions in the oven!

Prep: 10 minutesCook: 25 minutesTotal: 35 minutes
Yield 4-6 1x


  • 2 large red onions, spiralized
  • 46 tablespoons olive oil
  • 6 cloves garlic
  • 1/4 teaspoon salt
  • Pepper, to taste


  1. First, preheat oven to 400ºF.
  2. Then, prep onion by removing skin. Use blade A from the Inspiralizer to spiralized the entire onion. Evenly spread out on a large baking sheet.
  3. Smash 6 cloves of garlic and then mince. Add to baking sheet. Drizzle on around 4-6 tablespoons of olive oil and season with salt and pepper. Use your hands to toss in order to make sure everything is evenly (and generously) coated.
  4. Roast at 400ºF for 20-25 minutes, tossing with a spatula every 10 minutes.
  5. Remove onions once translucent. They will reduce in size quite a bit, but make sure not to overcook because you do not want your onions to become crispy.
  6. Let cool for around 5 minutes and then use a pair of scissors to chop onion strings.
Author: Lee Hersh
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