Caramelized Onions in the Oven
Published 11/5/2017 • Updated 3/29/2024
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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!
Hello beautiful people and welcome to a post that’s going to change your life. FOREVER. I did a pole on Instagram last week about onions. I asked if people if they thought “onions were life.” I was surprised (and sad) at the number of people that said NO. I guess onions are like olives, you either love them or you hate them? Whelp, I love them and if you’re an onion hater, I suggest you make them this way and give them a second chance. Everyone deserves a second chance.
Caramelized onions are the shit and did you know you can make them in the oven? I’ve made them on the stove many times and this oven method trumps all. It’s mess-free, hands-off, and easy! Plus, you can make a giant batch all at once.
What you need for this recipe is:
- onions (we suggest purple or yellow)
- olive oil
- garlic cloves
- salt
- pepper
Basic ingredients for a basic recipe. We decided to use the Inspiralizer for this recipe, but a knife will work. It’s so much easier to slice onions with the Inspiralizer and you don’t waste any of your onion. If you don’t have one yet, add it to your holiday wish list or heck, buy one! My friend Ali has an amazing website full of spiralized inspiration, recipes, and videos. We even wrote a recipe for Inspiralized last month featuring these very onions. Can you say Healthy Caramelized Onion Dip? Check it out HERE.
How to Make Caramelized Onions in the Oven
Ingredients
Instructions
- First, preheat oven to 400ºF.
- Evenly spread the onions out on a large baking sheet.
- 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.
- Roast at 400ºF for 20-25 minutes, tossing with a spatula every 10 minutes.
- 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.
- Let cool for around 5 minutes and then use a pair of scissors to chop onion strings.
Watch It
Nutrition
Nutrition information is automatically calculated, so should only be used as an approximation.
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So tell us, are you team onion?
“Caramelized onions are the shit and did you know you can make them in the oven?” I believe you meant to say :hit”?
You take a poll not a pole.
This is not a very kind comment
Carmelizing onions in oven rules! Onion jam makes a great pizza topping and of course onion soup is the best.
I love onions and garlic. No food is complete without them. These are used in medication also.
Onions and Garlic are king! We once run out of garlic and I felt like I can’t cook anymore! There is so much flavour in them, I do not know how people can hate onions and garlic!
This is a fun idea. And yes, some people seem to love onions and others hate them. In part, I think that depends on their experiences. When cooked right, onions can be amazing but when they’re not… the experience isn’t necessarily pleasant.
Caramelized onions are the best! They taste absolutely amazing with everything! I love this hack–definitely something I will keep in mind!