Fans of French onion soup who love it for its caramelized onions, beefy broth and cheesy toast topping won't be disappointed with this recipe, which offers all those elements plus a hands-on time of only 20 minutes.

Cooking Light
Source: Everyday Slow Cooker


Recipe Summary

20 mins
12 hrs 20 mins


Ingredient Checklist


Instructions Checklist
  • Coat a 4-quart slow cooker with cooking spray. Stir together the onions, butter and pepper in the slow cooker; cover and cook on LOW until the onions are very soft and deep golden brown, about 10 hours.

  • Stir in the stock, marsala, thyme and salt. Cover and cook on HIGH until the flavors are blended, about 2 hours.

  • Preheat the broiler with the oven rack 6 inches from the heat. Place the baguette slices on a baking sheet, and sprinkle evenly with the Gruyère. Broil until the Gruyère melts, 2 to 3 minutes. Ladle the soup into bowls. Top with the cheese toasts. Garnish with the additional thyme, if desired.


Tip: The Gruyère toasts are a smart, tasty application for bread that's beginning to pass its prime. If you have enough day-old bread on hand, don't bother with purchasing a fresh loaf. Toasting it cancels out any differences in flavor that it has from fresh bread.

Nutrition Facts

259 calories; protein 11g 22% DV; carbohydrates 32g 10% DV; exchange other carbs 2; dietary fiber 3g 12% DV; sugars 7g; fat 10g 15% DV; saturated fat 5g 25% DV; niacin equivalents 6.2mg 48% DV; vitamin b6 0.3mg 20% DV; sodium 604mg 24% DV; calories from fat 90kcal; percent of calories from carbs 47; percent of calories from fat 33; percent of calories from protein 16; percent of calories from sat fat 16.