Crock-Pot Caramelized Onions

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5 from 2 votes
Prep: 5 minutes
Cook: 8 hours
Total: 8 hours 5 minutes

This crock-pot caramelized onions recipe is a wonderful way to make burgers with Caramelized Onions. These Crock-Pot Caramelized Onions are easy and yet so delicious.

Crock-Pot Caramelized Onions.

Adding these Slow Cook Caramelized Onions will elevate any dish you add them too. Making Caramelized Onions has never been easier using this crock-pot method that requires minimal effort is the perfect way to make easy caramelized onions. Truly, it is one of my favorite ways to make these onions.

For more information about onions, check out the USDA to learn more!


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What We Love About This Perfect Caramelized Onions Recipe

  • Easy Ingredients: For this recipe you will only need 4 easy ingredients!
  • Adaptable: Use these caramelized onions for burgers or sandwiches or any other dish! Make a huge batch of this easy recipes.
  • Low Maintenance: Once you put these onions in the slow cooker, you only need to check them every few hours. Now you can add extra flavor to this caramelized onion recipe.
A dish of onions.

Ingredient Notes for Delicious Recipes

  • Onions: White onions, yellow onions, vidalia onions, or sweet onions will work. I used 2 pounds of onions.
  • Butter: Unsalted or salted butter both work.
  • All Purpose Seasoning: You will need all purpose seasoning, you can use a pre-made mix or make your own with this recipe!
  • Brown Sugar: For this recipe you will need brown sugar. Brown sugar contains molasses which will add that extra rich flavor when making caramelized onions fast.
Onions, butter, seasonings.

Equipment Needed

How to Make Caramelized Onions in the Slow Cooker

These are the basic steps for making Crock-Pot Caramelized Onions. Please refer to the recipe card below for more detailed instructions.

Crock-Pot Caramelized Onions in a pan.

STEP 1: CUTTING ONIONS

Starting but cutting up onions into medium thin slices with a sharp knife.

STEP 2: COOKING ONIONS

Add all ingredients to the crockpot and cook on the low setting for 8 hours. Make sure to check on onions every couple hours. If there is too much liquid in the slow cooker, crack the lid to allow some moisture to escape. Serve when done.

Prep and Storage Tips

HOW TO MAKE THIS RECIPE AHEAD OF TIME

To make this recipe ahead of time, chop up the onions and store in a plastic bag or air tight container the fridge for 1-3 days until you are ready to make these caramelized onions.

HOW TO STORE THIS RECIPE

Store caramelized onions in an airtight container in the refrigerator for up to 4 days.

HOW TO FREEZE THIS RECIPE

To freeze caramelized onions, store in a freezer bags for up to 1 year.

HOW TO REHEAT THIS RECIPE

If you are reheating from the fridge, you can sauté onions over low heat on the stove top to microwave for 1-2 minutes until hot. If you are taking from the freezer, make sure you allow the caramelized onions to thaw in the fridge overnight.

Frequently Asked Questions

HOW DO YOU MAKE CARAMELIZED ONIONS IN A CROCK POT?

Make these caramelized onions in a slow cooker on low for 8 hours of cooking along with butter, brown sugar, and all purpose seasoning. It is such an easy way to make this side dish.

CAN I SUBSTITUTE SWEET ONIONS IN PLACE OF WHITE ONIONS?

Sweet onions will work just as well as white onions.

CAN YOU FREEZE CARAMELIZED ONIONS?

You can freeze crock pot caramelized onions and have them stay good even when reheated. Make sure to store in a freezer safe bag to prevent freezer burn.

HOW LONG DOES IT TAKE TO SOFTEN ONIONS IN CROCK POT?

It will take 8-10 hours to soften onions in a crockpot. Do note that these will not be a firm as the traditional way.

Crock-Pot Caramelized Onions

Expert Tips for Making This Recipe

  • Cook on High: For quicker slow cook carmelized onions, cook on high for 5-6 hours. Disclaimer, cooking on low will yield best results as a longer cooking time at a low temperature to allow the natural sugars to release.
  • Chopping Onions: To prevent eye irritation or crying when chopping up onion, keep a wet paper towel next to the cutting board, simple try but makes huge difference.
  • Stove Top: If you don’t have a crockpot but still want to easily make caramelized onions in a pinch, try this recipe and technique to achieve similar results.
  • Caramelized Onions for Burger: There is nothing better than a burger with caramelized onions, it is a classic that everyone loves and great way to use this recipe.
  • French Onion Soup: Use these delicious onions as a base to make french onion soup in half of the time.

What to Serve with Caramelized Onion in Slow Cooker

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Crock-Pot Caramelized Onions
5 from 2 votes

Crock-Pot Caramelized Onions

Yield: 2 cups
Prep: 5 minutes
Cook: 8 hours
Total: 8 hours 5 minutes
Use this Crock-Pot recipe to make burgers with Caramelized Onions. These Crock-Pot Caramelized Onions are easy and low maintenance.
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Ingredients

  • 2 pounds white onions, peeled and sliced thin
  • 3 tablespoons butter
  • 1 tablespoon brown sugar
  • 1 teaspoon All Purpose Seasoning Blend

Instructions

  • Add all ingredients to slow cooker and toss to combine.
  • Cook on low for 8 hours.
  • Check onions every few hours, if there is too much liquid in the slow cooker, vent the lid to allow some moisture to escape.
  • Serve immediately.

Expert Tips

  • Cook on High: For quicker slow cook caramelized onions, cook on high for 5-6 hours. Disclaimer, cooking on low will yield better results.
  • Chopping Onions: To prevent eye irritation or crying when chopping up onion, keep a wet paper towel next to the cutting board, simple try but makes huge difference.
  • Stove Top: If you don’t have a crockpot but still want to easily make caramelized onions in a pinch, try this recipe and technique to achieve similar results.
  • Caramelized Onions for Burger: There is nothing better than a burger with caramelized onions, it is a classic that everyone loves and great way to use this recipe.

Estimated Nutritional Information

Calories: 361kcal | Carbohydrates: 50g | Protein: 5g | Fat: 18g | Saturated Fat: 11g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 4g | Trans Fat: 1g | Cholesterol: 45mg | Sodium: 155mg | Potassium: 706mg | Fiber: 9g | Sugar: 25g | Vitamin A: 576IU | Vitamin C: 34mg | Calcium: 154mg | Iron: 2mg
The nutritional information provided are estimates. To learn more about how I calculate this information go to www.itisakeeper.com/about-its-a-keeper/privacy-disclosure-policies/
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Course: Side Dish
Cuisine: American
Keyword: slow cooker

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