Slow-Cooker French Onion Soup

Slow-Cooker French Onion Soup

This fantastic French onion soup makes a hearty meal. Start the soup in the morning and come home to a no-fuss dinner.

Prep Time



Total Time






Reynolds™ Slow Cooker Liners
large onions, sliced (3 cups)
tablespoons margarine or butter, melted
tablespoons all-purpose flour
tablespoon Worcestershire sauce
teaspoon sugar
teaspoon pepper
cans (14 1/2 ounces each) ready-to-serve beef broth
Cheesy Broiled French Bread
slices French bread, 1 inch thick
cup shredded mozzarella cheese (3 ounces)
tablespoons grated or shredded Parmesan cheese
  1. Place Reynolds™ Slow Cooker Liners inside a 5- to 6 1/2 -qt slow cooker bowl. Make sure that liner fits snugly against the bottom and sides of bowl and pull the top of the liner over rim of bowl.
  2. In lined slow cooker, mix onions and margarine.
  3. Cover and cook on high heat setting 30 to 35 minutes or until onions begin to slightly brown around edges.
  4. Mix flour, Worcestershire sauce, sugar and pepper. Stir flour mixture and broth into onions. Cover and cook on low heat setting 7 to 9 hours (or high heat setting 3 to 4 hours) or until onions are very tender.
  5. Prepare Cheesy Broiled French Bread. Place 1 slice bread on top of each bowl of soup. Serve immediately.
Makes 8 servings
Make the Most of This Recipe With Tips From The Betty Crocker® Kitchens
Serve food directly from the lined slow cooker. Once your slow cooker cools, remove the liner and throw away for easy clean up.
Betty's Success Tip
Here's some "broth math" to help you if don't have any ready-to-serve beef broth on hand. You can use three 10 1/2-ounce cans of condensed beef broth with 2 1/2 soup cans of water or 7 cups of your homemade beef broth. Or add 7 cups of water with 7 beef bouillon cubes or 2 heaping tablespoons of beef bouillon granules.
Ingredient Substitution
Vegetarians in your family? Use 4 cans of ready-to-serve vegetable broth instead of the beef broth. The color will not be a rich, deep brown, though, so Golden French Onion Soup may be a more appropriate name!

Nutrition Information:

1 Serving (1 Serving)
  • Calories 185
    • (Calories from Fat 70),
  • Total Fat 8g
    • (Saturated Fat 3g,),
  • Cholesterol 5mg;
  • Sodium 1240mg;
  • Total Carbohydrate 21g
    • (Dietary Fiber 2g,
  • Protein 9g;
Percent Daily Value*:
    • 1 Starch;
    • 2 Vegetable;
    • 1 Fat;
    *Percent Daily Values are based on a 2,000 calorie diet.