Slow Cooker Onion Soup

  • Yield: 12
  • Servings: 12
  • Prep Time: 10m
  • Cook Time: 6:00 h
  • Ready In: 6:10 h

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Nutritional Info

This information is per serving.

  • Calories

  • Carbohydrates

    20 g
  • Cholesterol

    15 mg
  • Fat

    9 g
  • Fiber

    1 g
  • Protein

    7 g
  • Saturated Fat

    4.5 g
  • Serving Size

  • Sodium

    1140 mg
  • Sugar

    1.6 g
  • Trans Fat

    0 g
  • Unsaturated Fat

    2.4 g
  • Potassium

    489.2 mg
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Slow cooker onion soup. Very simple and delicious onion soup cooked in slow cooker. This soup is beef broth-based. For vegetarians, substitute vegetable broth for beef broth. You may also like Slow Cooker Easy Mexican Dip or Oven Cooked Meatballs

Discover the Magic of Slow Cooker Onion Soup

Welcome to my post on mastering the art of slow cooker onion soup! In this culinary journey, I will unveil the secrets behind creating a delicious and comforting bowl of onion soup using the magic of a slow cooker.

Get ready to tantalize your taste buds and impress your loved ones with this classic dish that is sure to warm your soul.

So, let’s dive right in and uncover the simmering secrets of slow cooker onion soup!

Unveiling the Key Players in this Delicious Dish

Now that you’re familiar with the magic of slow cooker onion soup, let’s dive into the key players that make this dish so delicious. The simple ingredients used in this recipe come together to create a symphony of flavors that will leave you craving for more.

First and foremost, we have the star of the show – onions. These humble vegetables are transformed into caramelized perfection as they simmer away in the slow cooker. Alongside the onions, we have fragrant garlic that adds depth and aroma to the soup.

To enhance the savory notes, we’ll be using rich beef broth and a touch of Worcestershire sauce. And of course, no onion soup is complete without a generous amount of melted cheese on top. So gather these ingredients and get ready to embark on a culinary adventure!

From Chopping Onions to Setting the Slow Cooker

Now that we have our ingredients ready, it’s time to dive into the step-by-step preparation of this mouthwatering slow cooker onion soup.

The first task on our list is chopping the onions. Take your knife and carefully slice the onions into thin, even slices. Remember, the key here is to achieve that perfect caramelization. Once the onions are chopped, we’ll move on to the next step – sautéing them in a hot pan until they turn golden brown and release their sweet aroma.

This will bring out their natural sweetness and enhance the flavor of the soup. After sautéing the onions, transfer them to the slow cooker and add in the fragrant garlic. Next, pour in the rich beef broth and a touch of Worcestershire sauce to elevate the savory notes. Give everything a good stir and set the slow cooker to low heat.

Now, all you have to do is sit back and let the magic happen as the flavors meld together over several hours of slow cooking. Your kitchen will soon be filled with the irresistible aroma of simmering onion soup. So go ahead, get started on this simple yet satisfying recipe!

Savory Variations: Catering to Vegetarians with a Flavorful Twist

But what if you’re a vegetarian or simply looking for a flavorful twist on this classic dish? Don’t worry, we’ve got you covered! There are plenty of delicious variations of slow cooker onion soup that cater to your dietary preferences. One option is to replace the beef broth with vegetable broth, which still provides a rich and savory base for the soup.

You can also add in some sliced mushrooms for an earthy and meaty texture. Another idea is to incorporate caramelized leeks along with the onions for a unique and slightly sweeter flavor profile. And if you’re a fan of cheese, don’t forget to top your bowl of onion soup with a generous amount of melted Gruyere or Swiss cheese.

The gooey goodness will take this dish to a whole new level of indulgence. So whether you’re a vegetarian or just looking to switch things up, these savory variations will ensure that everyone can enjoy the magic of slow cooker onion soup!

Slow Cooker Onion Soup


  • 6-8 onions, sliced
  • 1/4 cup butter
  • 4 10½-ounce (1315 ml) cans condensed beef broth
  • 1 soup can water
  • 2 teaspoons Worcestershire sauce
  • 1/8 teaspoon freshly ground black pepper


Step 1

Combine onion and butter in a large skillet. Cook until tender, about 15-20 minutes. Transfer mixture to slow cooker.

Step 2

Add beef broth, water, sauce, and black pepper. Cover and cook on low heat for 4-6 hours. Ladle slow-cooker onion soup into bowls. Garnish with cheese crackers (optional).

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