As an Amazon Associate I earn from qualifying purchases. This post may contain affiliate links. If you click on these links and make a purchase, I may receive a small commission at no additional cost to you.

Although caramelized onions take a little time to prepare, they are well worth the effort. Try them on pizza and hamburgers or served alongside your favorite steaks and roasted vegetables.

How to Make Caramelized Onions

Not sure what the keto diet is? Check out my beginner’s guide to the keto diet here. Want to try a guided keto journey for 28 days? Check this out!

How to Make Caramelized Onions

How to Make Caramelized Onions

Get your groceries delivered to you, unlimited trips, for only $14.99 per month! Save money and get free delivery? Why ever go to the grocery store again? Get a free trial of Amazon fresh here.

Yield: 6

Caramelized Onions

Caramelized Onions
Prep Time 15 minutes
Cook Time 1 hour
Total Time 1 hour 15 minutes

Ingredients

  • 3 large yellow onions
  • 3 T. unsalted butter
  • 2 T, extra virgin olive oil
  • Sea salt and black pepper, to taste
  • 1/3 c. balsamic vinegar

Instructions

1. Remove both ends of onion and cut in half lengthwise. Turn one piece of onion onto flat side and cut into thin slices, working from one end to another. Repeat until all onions are sliced.

2. Melt butter in a large skillet over medium heat. Add onion slices to skillet and drizzle olive oil over the top. Season with salt and black pepper, to taste, and stir to combine.  

3. Slowly cook the onions down over medium heat for 45 minutes to an hour. (Total cooking time will depend on how many onions were used, the sugar content in the onions, and how old they are). Stir the onions every 5 or 10 minutes while they are cooking to prevent scorching.

4. Once the onions are done caramelizing, add balsamic vinegar to deglaze the pan. While the liquid is bubbling, gently scrape the bottom of the pan with a wooden spoon to incorporate the fond (the brown
bits on the bottom of the pan) into the onions.

5. Season with additional salt and black pepper, if desired. Use immediately, or cool and store in the refrigerator for up to one week. Enjoy!

Nutrition Information:

Yield:

6

Amount Per Serving: Calories: 124

If you’re lost and not sure how to get started with the keto diet, this meal plan is for you. It’s a fool-proof guide to winning at the high-fat, low-carb lifestyle.

I love having keto snacks at the ready. Try my favorite keto chocolate bars, bone broth and protein powders here. Use code ONANDOFFKETO for 10% off your order!

Caramelized Onions

Looking for a more complete guide to start or stick to the keto diet? My Ketogenic Diet 101 eBook is a complete, all-in-one resource for the ketogenic diet. This book includes all the need-to-know info about the keto diet, how it affects lifestyle diseases like autism, epilepsy, diabetes and high blood pressure plus over 45 recipes, checklists and grocery lists to get you started. Want the grocery list, quick start guide and 7-day meal plan for free? Get it below.