Crock Pot Caramelized Onions

Last updated 05/8/2020 | |

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Let your crock pot do the cooking with this recipe for easy caramelized onions. Their rich, savory flavor is great on steak, tacos, or French onion soup.

Caramelized onions are delicious on so many dishes...with steak, tacos, even in scrambled eggs. They're delicious, but they take forever to cook.

I recently realized that there's an easy way to make caramelized onions--in the crock pot! They cooked while we slept--easy and delicious.

Tools Used to Make Crock Pot Caramelized Onions

Borner V-Slicer Mandoline: perfect for making evenly sliced onions and makes the most of each onion (very little waste)

Crock Pot: my favorite crock pot for making these onions

Crock Pot Caramelized Onions Instructions

Start with a bunch of onions. I got a huge bag at Costco and this is the perfect way to use them up.

bowl of onions

Cut off just the top and peel off the brown skin. Now you have a naked onion with the roots attached (that will help hold it together).

onion without skin

I need to introduce you to an amazing device, the Borner V-Slicer Mandoline.

mandoline slicer over bowl

It makes perfect, even slices.

slice of onion from mandolin slicer

It's sharp as all heck, so always use the hand guard thingy.

mandoline hand guard

onion in hand guard

There's practically no waste, either.

last bits of onion from mandoline

Dump all your onions into the crock pot with 2 tablespoons butter or olive oil and 1/2 teaspoon of salt.

onion slices in crock pot

Put the lid on and let them cook down on Low, stirring once or twice. Here they are after four hours. (A couple tablespoons of brown sugar would have been good here...maybe next time.)

onions cooking in crock pot

I gave them one last stir and headed off to bed. In the morning, I was greeted with this beautiful sight.

caramelized onions in crock pot

Easy Caramelized Onions in the Crock Pot

Ingredients

4 yellow onions, sliced

2 Tablespoons butter or olive oil

1/2 teaspoon salt

2 Tablespoons brown sugar (optional)

Instructions

Place all ingredients in slow cooker. Stir gently to combine. Put the lid on and cook on Low for 4 hours. Stir and add brown sugar, if using. Continue to cook on Low for 6-8 more hours, stirring occasionally.

Is your mouth watering?

Crock Pot Caramelized Onions

Prep Time: 10 minutes
Cook Time: 10 hours
Total Time: 10 hours 10 minutes

Ingredients

  • 4 yellow onions, sliced
  • 2 tbsp butter or olive oil
  • 1/2 tsp salt
  • 2 tbsp brown sugar, (optional)

Instructions

  1. Place all ingredients in slow cooker. Stir gently to combine. Put the lid on and cook on Low for 4 hours. Stir and add brown sugar, if using. Continue to cook on Low for 6-8 more hours, stirring occasionally.

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Pam

Hi, I’m Pam! I created Brown Thumb Mama to share my natural living journey, and help you live a greener life. Thanks for being here, and please check out the resources in my Natural Living Shop!

12 Comments

  1. Sophia on July 16, 2014 at 7:58 pm

    Add a couple of bay leaves and a teaspoon of rubbed thyme, and these are like candy! No sugar required. I eat them straight out of the pot, but they are a superb base for turkey soup. Or French onion soup, obviously. Also great on baked fish or mashed potatoes. (When I want them for turkey soup base, I dice them, rather than slice them. They become invisible in the soup, but their contribution is remarkable.)

  2. Angel At Large on June 6, 2014 at 3:45 pm

    This would be the best start ever for French onion soup. Definately giving this a try. Thanks!

  3. Patty Loader on May 31, 2014 at 1:06 pm

    Use them to put on top of your grilled burgers INSTEAD of a big bun

  4. Janet Slater on December 11, 2013 at 1:59 pm

    undercook them just a bit and then pressure can them in 1/2 pint to pint jars. Exceptional add in when making a pot roast in the slow cooker.

  5. Anonymous on April 26, 2010 at 7:47 am

    what kind of onions are those?

  6. Becky on September 16, 2009 at 11:45 pm

    OK…..I’m not sure why….BUT, when I saw this post on onions…..it made me think of the movie Julie and Julia…….Have you seen it yet?

  7. Brown Thumb Mama on September 15, 2009 at 8:43 pm

    Hi all, they keep well in the fridge for about a week. Mom freezes hers in separate little zip bags so they don’t spoil.

    Ooooh, the ways you can use carmelized onions…with leftover meatloaf in a sandwich (with just about any kind of sandwich), in a quiche or tart, on burgers, or on top of cheese-and-garlic bread.

  8. Karen Sue on September 15, 2009 at 8:14 pm

    They look mighty good, but I’m with them..how long can you store them and what all do you do with these lovelies??

  9. notsocrafty.com on September 15, 2009 at 5:12 pm

    I have a crock pot and no idea what to do with it. This is a great idea.

  10. Tree Hugging Mama on September 15, 2009 at 11:04 am

    Okay I have never done carmalized onions because of the time involved, but this is just one more reason to love my crock, any suggestions on storing them? And How Long?

    • Bocascrapper on June 5, 2014 at 6:22 pm

      I am going to pressure can mine. I haven’t done this before but giving it a try. I have frozen them in the past

      • Deidre Sowerby on February 15, 2015 at 5:03 pm

        will you please post on face book how you canned them and pictures…I love this idea and would love to know how the canning works out. and how did the freezing do?

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Pam

Hi, I'm Pam!

I created Brown Thumb Mama to share my natural living journey and help you live a greener life. Thanks for being here! Learn more about me.

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