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French Onion Soup makes a comforting, classic bowl of soup! Made with caramelized onions a slice of crusty bread and melty, delicious cheese! Includes stovetop and slow cooker methods!

French Onion Soup makes a comforting, classic bowl of soup! Made with caramelized onions a slice of crusty bread and melty, delicious cheese! Includes stovetop and slow cooker methods! // addapinch.com

French Onion Soup is one of my favorite soups, especially when the temperatures outside drop – even just a little.

French Onion Soup Recipe

French Onion Soup makes a comforting, classic bowl of soup! Made with caramelized onions a slice of crusty bread and melty, delicious cheese! Includes stovetop and slow cooker methods! // addapinch.com

There’s just something so very comforting about breaking through the cheesy, French bread exterior to get to the delicious brothy soup underneath!

It has always been one of those soups that I would look forward to having at restaurants, but wasn’t one I knew how to make at home when we first married.

It wasn’t until our third Christmas together that I tried my hand at making it. We were hosting the soup course of a Christmas progressive dinner and my husband requested it. It turned out perfectly and continues to be a go-to recipe for me.

How to Make French Onion Soup Recipe

French Onion Soup makes a comforting, classic bowl of soup! Made with caramelized onions, thyme, a slice of crusty bread and melty, delicious cheese! // addapinch.com

To make French Onion Soup, you’ll want to begin by caramelizing your onions. You’ll start by slicing your onions thinly and adding them, along with your salt and butter to your Dutch oven set over low heat. Stirring occasionally, you’ll let your onions cook until they have cooked down and are caramel in color, about 45 minutes to an hour.

French Onion Soup makes a comforting, classic bowl of soup! Made with caramelized onions, thyme, a slice of crusty bread and melty, delicious cheese! // addapinch.com

Once your onions have caramelized, add in your garlic, beef stock and wine (or chicken stock, if you prefer) and simmer for another 30 minutes.

When ready to serve, ladle your soup into oven safe bowls arranged on a baking sheet. Then top with slices of French bread and top with grated cheeses. Bake in the oven until the cheeses have melted, about 8 minutes.

The Onions

The most important ingredient in this soup, in my opinion, is the onion. Different onions can change the overall taste of your soup, leaving some to think one variety of onion makes for a better soup than others. While it may be a personal preference, through the years, I have tested various types of onions, cooking times, amount of caramelization, etc to find the recipe that appeals the most – and this is it!

For the onions, there are three varieties that I have tested.

Sweet Onions – sweet onions, such as Vidalia, give the soup a mild sweetness flavor without a bitter aftertaste. 

Yellow Onions – yellow onions give the soup a lot of flavor with some bitterness.

Red Onions – red onions give the soup a strong flavor without a lot of sweetness.

Throughout all of the testing and years of making this soup, I prefer to use sweet onions as I believe it makes the best onion for French Onion Soup. 

French Onion Soup makes a comforting, classic bowl of soup! Made with caramelized onions a slice of crusty bread and melty, delicious cheese! Includes stovetop and slow cooker methods! // addapinch.com

How to Make Slow Cooker French Onion Soup Recipe

I love to make my French Onion Soup in the slow cooker! It is a two-step process, but one that leaves you without having to babysit the onions as they caramelize or the soup as it makes it magic!

Slow Cooker French Onion Soup

Step One: Add your sliced onions to the slow cooker, along with butter and salt. Pop the lid onto your slow cooker and set it on low heat for 10 hours. This is perfect to do overnight so that in the morning you are ready for step two of your soup!

Step Two: Once your onions have caramelized in your slow cooker, you are ready to move to step two with your Slow Cooker French Onion Soup!

French Onion Soup makes a comforting, classic bowl of soup! Made with caramelized onions a slice of crusty bread and melty, delicious cheese! Includes stovetop and slow cooker methods! // addapinch.com

There’s just something about a comforting bowl of soup that seems to make any day better!

Other Favorite Cozy Soup Recipes

Chicken and Dumplings

Vegetable Soup

Chicken Tortilla Soup

Potato Soup

Minestrone Soup

Here’s my French Onion Soup recipe. I hope you love it as much as we do!

4.86 from 7 votes

French Onion Soup

Soup and Stew 1 hr

French Onion Soup makes a comforting, classic bowl of soup! Made with caramelized onions a slice of crusty bread and melty, delicious cheese! Includes stovetop and slow cooker methods! // addapinch.com
Cook Time 1 hr
Servings 8
Course Main Course, Soup
Cuisine American, French
Author Robyn Stone | Add a Pinch
French Onion Soup makes a comforting, classic bowl of soup! Made with caramelized onions a slice of crusty bread and melty, delicious cheese! Includes stovetop and slow cooker methods!

Ingredients  

  • 6 medium yellow onions thinly sliced
  • 4 tablespoons butter
  • 1/2 teaspoon salt
  • 2 tablespoons olive oil
  • 1 clove garlic minced
  • 8 cups beef stock or broth (64-ounces)
  • 1/2 cup chicken stock or broth
  • 8 slices French bread toasted
  • 2 cups Gruyere cheese grated
  • 1/2 cup Parmesan cheese grated

Instructions 

French Onion Soup Recipe (Stovetop)

  • Add onions, butter and salt to large Dutch oven with olive oil set on low heat until the onions are browned and caramelized, about 1 hour. Add garlic and heat thoroughly, about one minute. Pour in beef stock and wine (or chicken stock). Stir, cover and allow to simmer over low heat for 30 minutes.
  • When ready to serve, ladle soup into oven proof bowls and top with bread and cheeses. Place on lined baking sheet and under the broiler in the oven until the cheeses have melted and browned lightly, about 8 minutes.

Slow Cooker French Onion Soup Recipe:

  • Add onions, butter and salt to slow cooker. Cook on low setting for 10 hours. 
  • Add garlic, beef stock and wine (or chicken stock). Stir well to combine and cook on low setting for 8 hours. 
  • When ready to serve, ladle soup into oven proof bowls and top with bread and cheeses. Place on lined baking sheet and under the broiler in the oven until the cheeses have melted and browned lightly, about 8 minutes. 

Video

Notes

Make-Ahead French Onion Soup:
Cook French Onion Soup as directed and ladle into oven proof bowls. Cover the bowls and place into the refrigerator for up to 3 days. When ready to serve, preheat the oven, remove the soup from the refrigerator and place into the oven to reheat the soups for 15 minutes. Remove from the oven and top with bread and grated cheeses. Return to the oven and bake as directed. 

Nutritional Information

Calories: 466kcal | Carbohydrates: 47g | Protein: 25g | Fat: 19g | Saturated Fat: 11g | Cholesterol: 56mg | Sodium: 1234mg | Potassium: 694mg | Fiber: 2g | Sugar: 6g | Vitamin A: 535IU | Vitamin C: 6.4mg | Calcium: 476mg | Iron: 3.3mg

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Robyn xo

Make-ahead Recipes

Robyn Stone

..where I share sweet, savory and southern recipes, as well as home and garden tips and tidbits of travel.

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Recipe Review




Comments

  1. Yes – wondering about the Olive Oil too mentioned on the directions of making the soup – how much olive oil or is it in replacement of the butter??

    1. Hi Germaine,
      Thanks for mentioning to me – I’ve corrected the ingredients list in the recipe to include the amount of olive oil. Enjoy this – it’s delicious!

    1. Hi June!
      Not a stupid question at all. 🙂
      I’ve not made it yet in the Instant Pot – I hope to give it a test soon.
      Thanks!

    1. As I explain in my post, this is a two step process in the slow cooker. You cook the onions, butter, and salt in the slow cooker for 10 hours to carmelize the onions. Then you add the garlic, beef stock, and wine to the slow cooker with the onions and cook for another 8 hours. Hope you enjoy the soup, Nicole.

  2. Can the soup be frozen, in appropriate individual portions, once it’s done in the slow cooker and then defrosted as needed, finishing off in the oven with the bread and cheeses?

    1. It can be frozen, defrosted, and then finished just as you have written, Sharon. Hope you enjoy!

    1. The salt, cheese, beef stock, and French bread all contain sodium. Hope you enjoy the soup, Linda.

  3. Well I made the French Onion Soup for the first time and I can honestly say it is the best soup I have ever tasted!
    We had few friends over for dinner and they were begging me for the recipe, thank you for making my dinner party a huge success, can’t wait to try the other recipes!

  4. I’ve never made onion soup and want to give it a go. Have spent a good deal of time looking for individual serving containers but most seem so small. Are your Staub cocottes 8 ounce or the 0.5 quart/16 ounce? Anxious to try your recipe! Thank you!

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