Slow Cooker Onion Soup Recipe

Updated July 1, 2017 by
crock pot onions
Diana Rattray

This slow cooker onion soup is incredibly easy and flavorful. The bowls of soup are topped with French bread and mozzarella cheese and then it's broiled to melt and brown the cheese.

Prep Time: 15 minutes
Cook Time: 5 hours 30 minutes
Total Time:5 hours 45 minutes



    1. Melt the butter in a large skillet over medium heat. Add the onions and cook until they are transparent, stirring frequently.
    2. Add the flour; cook, stirring, until flour is well incorporated into the butter.
    3. Transfer the onion mixture to the slow cooker. Add beef broth and hot sauce. Cook on low for 5 to 7 hours or on high for 3 to 4 hours.
    4. Ladle the soup into oven-safe bowls. Top with bread and some of the shredded cheese. Broil until the cheese is bubbly and browned.

    Makes 6 Servings

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