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Slow Cooker French Onion Soup

[heart_this] · Apr 6, 2020 · 8 Comments

Slow Cooker French Onion Soup

A super easy version of french onion soup made in a slow cooker! Sweet caramelized onions in a tasty broth topped with toast and plenty of melted cheese! Yum!

French onion soup is so amazingly good but it requires a bit of time and effort to stand at the stove for a few hours, properly, caramelizing the onions… needless to say, I do not make it too often. This slow cooker version takes almost no effort at all and it’s almost as good! This version is as easy as slicing the onions, which, unfortunately, is still tear inducing, throwing them into the slow cooker to slowly caramelize before adding the broth and the remaining soup ingredients to cook a bit more. The onions take a long time to caramelize in the slow cooker, at 10+ hours, but they do not require any attention so you can let them cook overnight (or all day long). Once the soup is made you top it with toasted baguette slices along with plenty of cheese and broil to melt the cheese before digging in! Finally, a french onion soup that I can make all the time!

Slow Cooker French Onion Soup

Slow Cooker French Onion Soup

Slow Cooker French Onion Soup

Slow Cooker French Onion Soup

Slow Cooker French Onion Soup
Slow Cooker French Onion Soup

Slow Cooker French Onion Soup

Prep Time: 10 minutes Cook Time: 14 hours Total Time: 14 hours 10 minutes Servings: 4

A super easy version of french onion soup made in a slow cooker! Sweet caramelized onions in a tasty broth topped with toast and plenty of melted cheese! Yum!

ingredients
  • 3 pounds onions, sliced
  • 3 tablespoons butter
  • salt and pepper to taste
  • 6 cups beef broth (or vegetable broth)
  • 1 teaspoon fresh thyme, chopped (or 1/2 teaspoon dried thyme)
  • 1 tablespoon balsamic vinegar
  • 2 teaspoons Worcestershire sauce
  • 8 slices baguette, toasted
  • 1 cup gruyere, grated
directions
  1. Place the onions, butter, salt and pepper in a slow cooker and cook on low for 10-12 hours.
  2. Add the broth, thyme, balsamic vinegar, and Worcestershire sauce and cook on low for 2-4 hours.
  3. Divide the soup between 4 oven safe bowls, top with the baguette and sprinkle on the cheese before broiling in the oven until the cheese has melted, about 2 minutes.
Option: Replace 1 cup broth with red wine.
Option: Add 1-3 tablespoons brandy!
Option: Replace gruyere with another cheese like swiss, mozzarella or an Italian blend.
Note: This recipe makes for 4 2 cup servings (meal sized) or 8 1 cup servings (side dish sized).
Nutrition Facts: Calories 355, Fat 20g (Saturated 12g, Trans 0.3g), Cholesterol 59mg, Sodium 1112mg, Carbs 47g (Fiber 6g, Sugars 18g), Protein 22g

Nutrition by: Nutritional facts powered by Edamam
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Crockpot, Food, Gluten-free, Recipe, Slow Cooker, Soup

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Reader Interactions

Comments

  1. cristina kadonsky says

    April 6, 2020 at 4:15 pm

    Can you tell me the carbs without the bread? Thank you!
    Cristina

    Reply
  2. Dan says

    April 9, 2020 at 10:18 am

    Can the soup be frozen for later use after Step 2?

    Reply
    • kevin says

      April 10, 2020 at 8:28 am

      Yes it can! Enjoy!

      Reply
  3. Gem says

    April 15, 2020 at 12:57 pm

    Have you tried this recipe with the slow cooker on high to shorten the cook time?

    Reply
    • kevin says

      April 16, 2020 at 8:18 am

      I have not.

      Reply
    • Patrick says

      October 14, 2020 at 10:42 pm

      I have, and it worked fine. (I did about 5 hours of caramelizing the onions, and about 1½ hours with the beef stock.)

      Reply
  4. Rjchard Brewer says

    October 29, 2022 at 4:11 pm

    Which onion has the best taste?
    Richard

    Reply
    • kevin says

      October 31, 2022 at 9:27 am

      When they are cooked down and caramelized they are all pretty similar. I generally use yellow onions but red onions and vidalia are also really good!

      Reply

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About Me

Kevin: I came to realize that my meals were boring and that I had been eating the same few dishes over and over again for years. It was time for a change! I now spend my free time searching for, creating and trying tasty new recipes in my closet sized kitchen.
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