Slow Cooker Caramelized Onions and Peppers
Buttery and full of flavor, these slow cooker caramelized onions and peppers are a fantastic addition to any meal! And your crockpot does all the work. Gluten free and vegetarian with dairy free / vegan option.
Caramelized onions are the way to my heart. And caramelized onions + peppers? Now that is definitely the way to my heart. Or an added little bonus, if you will. And man am I excited to share this recipe with you today.
You see, this recipe was an attempt to recreate a dish that my grandma always used to make.
She made these absolutely killer slow cooked onions and peppers, which she cooked for hours upon hours in this enormous electric skillet that probably weighed more than she did.
And to these awesome onions and peppers she would then add some scrambled eggs. She would make a huge batch and send them back with me to college or in later years back to my job in DC.
And I would proceed to eat them all in 2.5 seconds. So much for pacing myself.
About These Caramelized Onions and Peppers
Anyway, the recipe is finally here.
So instead of doing this in a skillet like my grandma, I decided to turn to my trusty slow cooker to get the job done. I use it all the time for my crockpot french onion soup, where the base is made up of caramelized onions.
So pretty much the same method is used in this recipe here today. I’ve made a few tweaks but otherwise the process is the same. Just no soup (obviously).
I say this in the french onion soup post and I’ll say it again here.
This is not a totally hands-off method. You do need to be around to stir the onions and peppers every so often (about every 45 minutes).
But I do promise that the end result is absolutely worth it. Buttery and packed full of flavor. You’re gonna want to eat these onions and peppers straight out of the crockpot with a spoon.
My favorite way to enjoy them is stirred into some scrambled eggs. Just like my grandma made. But with some avocado toast on the side.
Additional Slow Cooker Recipes You Might Enjoy:
- Slow Cooker Sweet Potato Spinach Curry
- Slow Cooker Thai Sweet Potato Soup
- Crockpot Pulled BBQ Chicken
- Crockpot Stuffed Pepper Soup
- Slow Cooker Butternut Squash Chili
- Slow Cooker Vegetarian Tortilla Soup
- Crockpot Chocolate Stout Pulled Pork
- Or, check out all our slow cooker recipes here!
Did you make this recipe? Rate and review it down below! I’d love to hear from you.
Slow Cooker Caramelized Onions and Peppers
Buttery and full of flavor, these slow cooker caramelized onions and peppers are a fantastic addition to any meal! And your crockpot does all the work. Gluten free and vegetarian with dairy free / vegan option.
Ingredients
- 2 large yellow onions, thinly sliced
- 1 medium yellow bell pepper, thinly sliced
- 1 medium red bell pepper, thinly sliced
- 1 medium orange bell pepper, thinly sliced
- 5 tablespoons unsalted butter or dairy free butter, melted
- ½ teaspoon salt
Instructions
- Add the onions and peppers to your crockpot, then drizzle with the butter and sprinkle with the salt. Toss to combine.
- Turn on your crockpot to high, cover and let cook for 1 hour.
- After the first hour, give the mixture a good stir. Place a double layer of paper towels under the lid (which will help to absorb some of the released moisture - you’ll want to replace this layer about 2 to 3 times during the cooking process).
- Continue to cook on high for about 5 to 6 additional hours, stirring about every 40 to 45 minutes. You want the onions to be a caramel color and the peppers to be nice and tender and so soft. Toward the end of the cooking time, keep a closer eye on the crockpot (you don’t want to let the onions / peppers burn and may need to stir them more often).
- Discard the paper towels. Serve however you would like, scooping them out with a slotted spoon to get rid of any excess liquid in the crockpot.
Notes
My biggest piece of advice here - know your slow cooker. They all cook slightly different and have slightly different heat levels. After making the onions and peppers like this a few times, I know how often I need to stir and exactly how long it takes.
You also want to slice everything about the same size - so that they all cook evenly. I slice my onions and peppers about a touch more than ¼ inch thick.
You could also use green peppers or really any color combo of peppers you would like.
Nutrition Information:
Yield: 6 Serving Size: 1Amount Per Serving: Calories: 120Total Fat: 10gSaturated Fat: 6gTrans Fat: 0gUnsaturated Fat: 3gCholesterol: 25mgSodium: 180mgCarbohydrates: 8gFiber: 1gSugar: 4gProtein: 1g
Nutrition data shown is an estimate provided by an online calculator and is for informational purposes only. It should not be considered a substitute for a medical professional’s advice.
Hi I also love this and going to add cabbage sliced thin yum yum on brautworst or any sausages will be delightful oh and some fresh garlic from the garden !Â
Glad you enjoyed Joyce! That sounds delicious 🙂
Caramelized onions are my boyfriend favourites so I will try this recipe with peppers. I never think about adding peppers to onion but this is so simply gorgeous 🙂
Oh yum! There is so much that you can do with caramelized peppers and onions and these looks delicious!
I loooove that this is all made in the crockpot! What a totally genius idea! Caramelizing onions are a big favorite of mine and i love that I can just stick it in the crockpot and forget about it! 😉
This does sound amazing – and perfect for so many things! I think I’d love a grilled chicken sandwich piled high with these…thanks to your Grandma for sharing her secrets, and I love the slow cooker twist!
I would be all over this!! I love family recipes – they make even delicious things like caramelized onions + peppers taste even better!
Agreed! They make it feel even more special!
what a great trick! looks delish.
This makes me just want to curl around my crock pot and eat these onions and peppers for dinner all on their own! Awesome slow cooker recipe, Ashley! 😀
I didn’t know you could caramelize onions in a slow-cooker but it totally makes sense! And it sounds like a much easier way to do it. Grandmother’s recipes are the best 🙂
So much easier!! Thanks Katy!
Was wondering if they would caramelize, food romk or, I
M going to ad some sundries tomatoes it really gives it a great flavor, and the salt on the onions to draw out the moisture is a trick I do too. Wish me luck.n
Hope you enjoyed!
I love, love, love me some caramelized onions – what a BRILLIANT idea this is to make them with peppers in a slow cooker! I could eat this by the spoonful!
Thanks Shashi! I definitely ate it by the spoonful! 🙂
Love that you made these in the slow cooker, Ashley! What a fantastic idea! This is totally calling my name. I think I could eat these plain or pop them into just about anything! Pinned!
Great idea to stir these into some scrambled eggs! My hubby would love this!
I just love that you got this recipe from your grandma, Ashley. Obviously this is a really well tried and tested recipe – I love that, too!
I really wish you lived near to me so you could pop over and make me this breakfast … avocado toast and all!
Yes! That would be fun! 🙂
What a great way to jazz up some eggs! I have never tried caramelized onions in the crock pot. Will be trying it soon. 🙂
Aww yea, a grandma inspired recipe! On another note, this post got me in the mood for French onion soup…. Hmmm, maybe for dinner tonight I’ll make some?!
That sounds like a fantastic plan! 🙂 Happy weekend!
I love a versatile dish like this, it can be added to so many things or eaten alone straight from the pot! Also love the fact you altered it for a slow cooker………. I love my slow cooker!!!
Thanks Emma! I love mine too!
What a great idea of slow cooking caramelized onions and peppers. I hate the endless babysitting on the stove over a skillet for a long time 😀
Oh gosh me too – this way you still have to stir but wayyyyy less often!
You are not alone, I get sidetracked all the time amidst posting things for holidays, etc. I hate that! It’s the day to day stuff that’s more important, and these sound really special. It’s a recipe from your grandmother so it has to be, right? I love the sound of doing this in the crock pot — I would find so many uses for this!
I think those look like the most perfect scrambled eggs ever! Those veggies look amazing, I will definitely be trying this recipe soon. And I love that you used the slow cooker, I definitely prefer that option whenever possible! Pinned!
Thanks Stacey!! Hope you enjoy! 🙂
These would be sublime on fresh tortillas or maybe on top of some neutral risotto like saffron. Caramelized onions are the best 🙂
Agreed! 🙂
You so know the way to my heart. Just look at hoe delicious these onions and peppers look. Delish
Mmm…buttery caramelized onion are the best! I love that you can multitask while you make them too.
Now I’m craving that whole combination- minus the coffee 😉 – for breakfast tomorrow!
Yum!!! I never have the time to make GOOD caramelized onions on the stove. This is the perfect solution!
Now I feel like having a sandwich with avocado omomomomom!!
These caramelised veggies look delicious – I really adore caramelised onion! Need to give the recipe a go soon, they would also be so amazing tossed into some pasta in Italian tomato sauce! Yum, thanks for sharing Ashley!
Yes! They would be awesomeeee in pasta! Thanks Jess!
(Don’t think my first comment went through)…was just saying that this is such a treat to have around to put on anything but I love the idea of having it with scrambled eggs! I love anything with eggs. : ) I have to try this crock pot method!
This is what I’m talkin’ about! Love recipes that can be used endlessly.
Crockpots foreva.
This sounds like a recipe my husband would love. I can already picture him putting these caramelized onions on a sandwich or burger!
Caramelized onions are the best and the fact that you made them with peppers in the slow cooker is the way to my heart! They look incredible and I love that you added them to scrambled eggs just the way your grandma makes them for you:) So delicious!!
Thanks Kelly! Have a great weekend!!
Caramelised onions and peppers is my JAM!! Especially the onions, I may need to join a support group. Why have I never thought of mixing them into scrambled eggs?! They look phenomenal! And by phenomenal I mean when are coming over for breakfast?!
Do itttt!!! haha You are welcome anytime! 🙂
What a fantastic idea to do this in the slow cooker. Genius, girlfriend!
I love nostalgic recipes like this. All of my family recipes are super labor intensive (like homemade pierogies that take about 300 hours…). So I love that this is slow cooker, easy but delicious!
haha oh gosh, I know what you mean! Thankfully my grandma’s recipes were all mostly slow cooked but nothing complicated!!
Caramelized onions are the way to my heart too! 😀 These look just perfect and love the addition of peppers!
I can just imagine this on a big bean burger or something. I love how caramelising onions really brings out the flavour of them.