Slow-Cooker French Onion Soup with Gruyère Toasts

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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.

EatingWell Test Kitchen

Updated on September 19, 2023

Tested by

EatingWell Test Kitchen

Prep Time:

20 mins

Additional Time:

12 hrs

Total Time:

12 hrs 20 mins

Servings:

Yield:

8 servings

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Ingredients

Cooking spray
10 cups vertically sliced onions (from 5 onions)
2 tablespoons unsalted butter, melted
½ teaspoon black pepper
6 cups unsalted beef stock
¼ cup dry Marsala wine
1 teaspoon chopped fresh thyme, plus more for garnish
¾ teaspoon kosher salt
12 ounces whole-wheat baguette (see Tip), cut into 16 slices
5 ounces Gruyère cheese, shredded (about 1 1/4 cups)

Directions

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.

Tips

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.

Originally appeared: Everyday Slow Cooker

Nutrition Facts (per serving)

259	Calories
10g	Fat
32g	Carbs
11g	Protein

Nutrition Facts
Servings Per Recipe 8
Serving Size about 1 1/2 cups soup, 2 toasts
Calories 259
% Daily Value *
Total Carbohydrate 32g	12%
Dietary Fiber 3g	11%
Total Sugars 7g
Protein 11g	22%
Total Fat 10g	13%
Saturated Fat 5g	25%
Sodium 604mg	26%

Nutrition information is calculated by a registered dietitian using an ingredient database but should be considered an estimate.

* Daily Values (DVs) are the recommended amounts of nutrients to consume each day. Percent Daily Value (%DV) found on nutrition labels tells you how much a serving of a particular food or recipe contributes to each of those total recommended amounts. Per the Food and Drug Administration (FDA), the daily value is based on a standard 2,000 calorie diet. Depending on your calorie needs or if you have a health condition, you may need more or less of particular nutrients. (For example, it’s recommended that people following a heart-healthy diet eat less sodium on a daily basis compared to those following a standard diet.)

(-) Information is not currently available for this nutrient. If you are following a special diet for medical reasons, be sure to consult with your primary care provider or a registered dietitian to better understand your personal nutrition needs.

Slow-Cooker French Onion Soup with Gruyère Toasts

Ingredients

Directions

Tips

Nutrition Facts (per serving)

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