IT’S TIME TO MAKE SLOW COOKER FRENCH ONION SOUP
A cozy slow cooker version of classic French onion soup—sweet caramelized onions, rich beef broth, and melted Gruyere on toasted baguette slices. Easy to assemble and perfect for a cold night.
Ingredients
Main Ingredients
- 4 each yellow onions (large) thinly sliced
- 3 tablespoons unsalted butter
- 2 tablespoons olive oil
- 1 teaspoon salt
- 0.5 teaspoon black pepper freshly ground
- 2 tablespoons all-purpose flour
- 6 cups beef broth low-sodium or homemade
- 0.25 cup dry sherry or dry white wine
- 2 teaspoons fresh thyme or 0.5 teaspoon dried thyme
- 1 each bay leaf
- 1 clove garlic minced
- 1 loaf baguette sliced and toasted
- 8 ounces Gruyere cheese grated
Instructions
Preparation Steps
- Heat butter and olive oil in a large skillet over medium heat. Add sliced onions, salt and pepper. Cook, stirring often, until onions soften and begin to caramelize, about 15–20 minutes.
- Stir in minced garlic and flour and cook for 1–2 minutes to remove the raw flour taste.
- Transfer the onion mixture to the slow cooker. Add beef broth, dry sherry, thyme and bay leaf. Stir to combine.
- Cover and cook on low for 8 hours (or high for 4 hours) until onions are deeply caramelized and soup is rich.
- Remove bay leaf and adjust seasoning with salt and pepper. Ladle soup into oven-safe bowls, top each with toasted baguette slices and a generous handful of grated Gruyere.
- Place bowls under a broiler until cheese is melted and bubbly, 2–3 minutes. Serve immediately.
Notes
For a vegetarian version, substitute beef broth with vegetable broth and omit the sherry if desired. Leftovers keep well in the refrigerator for 3 days.
Nutrition
Serving: 200gCalories: 120kcalCarbohydrates: 120gProtein: 120gFat: 120gSaturated Fat: 120gPolyunsaturated Fat: 120gMonounsaturated Fat: 120gTrans Fat: 120gCholesterol: 120mgSodium: 120mgPotassium: 120mgFiber: 120gSugar: 120gVitamin A: 120IUVitamin C: 120mgCalcium: 120mgIron: 120mg
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