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Slow Cooker French Onion Soup


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  • 6 tbsp butter
  • 4 large yellow onions
  • 1 tbsp granulated sugar
  • 4 cloves garlic, minced
  • 1/2 cup cooking sherry
  • 7 cups reduced sodium beef stock or broth
  • 1 tsp sea salt
  • 1 tsp dried thyme
  • 2 bay leaves
  • 8-12 slices French baguette
  • 1/2 cup shredded Gruyere Cheese
  • 1/2 cup Emmental or Swiss Cheese, shredded
  • 1/4 cup freshly shredded Parmesan cheese
  • 2 tbsp shredded mozzarella cheese



Step 1

1.Heat butter in a large heavy pot over medium-high heat; cook and stir onions until they become translucent, about 10 minutes
2.Sprinkle onions with sugar;reduce heat to medium.
3. Cook, stirring constantly,until onions are soft and browned, at least 30 minutes, Stir in garlic and cook until fragrant, about 1 minute
4.Stir Sherry into onion mixture and scrape bottom of pot to dissolve small bits of browned food from the pot
5. Transfer onions into slow cooker and pour in beef stock
6. Season to taste with sea salt; stir in thyme and bay leaf
7. Cover slow cooker, set on high, and cook 4-6 hours(or low for 8-10 hours)
8.10 minutes prior to serving-Preheat oven broiler, arrange bread slices on a baking sheet and broil bread slices 8 inches from heat source, until toasted 2 minutes
9. Combine the cheeses in a bowl, tossing lightly
10.Fill oven save bowls 3/4 way full with soup, float one to two slices depending on size of soup bowl.
11. Top bread with about 2 tbsp cheese mixture
12. Place filled soup bowls onto a baking sheet and broil until cheese is lightly browned and bubbling, about 2-4 minutes


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