Sauces & Dips/ Sides & Snacks

Slow Cooker Caramelized Apple Onion Recipe

February, 2017 (Last Updated: December, 2019)

Slow Cooker Caramelised Apple Onion Recipe – buttery slow cooked caramelised onions and sweet apples.

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Caramelised onions and apples in a clear jar

This slow cooker caramelised apple onion recipe is an accompaniment that can take your meals to the next level! Easy to make and flavourful without much, this paleo condiment is a must-make in your home.

I’ve made caramelised onions on this blog before, but I wanted to do something a little different this time. My next thought was adding a fruit to it – if you’re a regular reader, you’ll see that I LOVE adding fruits to savoury meals (makes me feel a little more 5* chef-y).

So, I poured some apples and onions in my slow cooker, gave it a toss and let it be overnight. I woke up to a sweet-smelling aroma and thanked God for good food.

How to make Caramelized Onion Recipe: Stove top vs Slow Cooker

Caramelised onions are very easy to make. You can choose to make them on your stove top or with a slow cooker. 

The benefits of using a slow cooker is that you can literally pour everything in without worrying about the food burning. You can set it and forget it. 

With the stovetop, you get the results quicker but you also have to stir the onions for the duration of the cooking process so they don’t burn

I prefer using a slow cooker method as I think the onions come out more buttery. However, the stove top does add a nice crispiness to the onions. 

Stove top caramelised onions are probably best used in burgers and with slaws. Slow cooker caramelised onions is best used in stuffings. 

Stuffed chicken breast wrapped in bacon with cauliflower rice and cabbage

Try my caramelised onions stuffed chicken breasts as it makes the chicken much more juicier. 

You will know when onions are caramelised by the colour change. They will turn a deep dark brown colour and become softer and jammier. 

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How to make an onion Chutney

A way to take this paleo caramelized onions and apples recipe to the next level is by making it into an apple onion chutney or apple onion jam. 

The texture is perfect once it’s slow cooked, all you need to do is add some spices like curry powder and cinnamon, some apple cider vinegar or lemon juice. 

To make it jammier, in the last 2/3 hours of cooking,  just leave the lid off a bit whilst cooking.

Caramelised onions in a clear jar with apples in the background

FAQ’s about caramelised onions:

Can you freeze caramelised onions?

Yes! Freezing caramelised onions is the easiest and longest way to store and preserve them. They will last for 3 or 4 months in the freezer and only 3 or 4 days in the fridge. 

How do you reheat caramelised onions?

The best way to reheat caramelised onions is on the stove top. This way, you have the best of both worlds when you make it in the slow cooker as it crisps up on the stove. However, microwaving for 3-4 minutes from frozen is also good.

Caramelised onions are keto friendly and vegan so this is definitely a great all round condiment!

I hope you’ll enjoy this one, make sure to subscribe so you’ll know when the next recipe is out! I made it for my friend and she licked her plate (no joke!).

5 from 2 votes
Caramelised onions and apples in a clear jar with apples
Slow Cooker Caramelised Apple Onion Recipe
Prep Time
20 mins
Cook Time
8 hrs
Total Time
8 hrs 20 mins

Slow Cooker Caramelized Apple Onion Recipe – buttery slow cooked caramelised onions and tart apples. Perfect condiment to burgers and chicken breasts. 

Course: Condiment
Cuisine: American
Keyword: paleo
Servings: 15 servings
Calories: 80 kcal
Author: WhittyPaleo
  • 2 kg onions (or 4 pounds, chopped)
  • 750 g apples (or 1-2 pounds, chopped – I used Gala/Braeburn)
  • 1-2 tbsp balsamic vinegar
  • 1/4 cup coconut oil (melted)
  • 2-3 tbsp honey
  1. Toss all ingredients in slow cooker and place on low for 8-10 hours.

Recipe Notes

You don’t have to chop your onions and apples finely, as it won’t affect the final result.

If you want a jammier texture, leave it longer but take the lid off about an inch whilst cooking.

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  • Reply
    November, 2019 at 1:16 PM

    Super easy to put together and came out great! Thanks for the recipe

  • Reply
    Debbie McCann
    December, 2018 at 12:18 PM

    Thank you. Delicious recipe.

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