Slow Cooker French Onion Soup

Slow Cooker French Onion Soup

8 servings
Slow Cooker French Onion Soup - Yes, you can make French onion soup in the crockpot! Ridiculously easy with basically no stirring and no work!

Ingredients

  • 3 pounds sweet onions

    thinly sliced

  • 3 tablespoons unsalted butter

    melted

  • 2 teaspoons brown sugar
  • Kosher salt and freshly ground black pepper
    to taste
  • 6 sprigs fresh thyme
  • 1 bay leaf
  • 6 cups beef stock
  • 2 teaspoons sherry vinegar
  • 1 French baguette

    sliced, 12-ounce

  • 1 cup shredded Gruyère cheese
  • 1 cup shredded asiago cheese

Directions

  1. 1

    Place onions into a 6-qt slow cooker.

  2. 2

    Stir in butter, brown sugar and 1 teaspoon salt; top with thyme and bay leaf. Cover and cook on high heat for 8-10 hours, or until onions are caramelized and browned.*

  3. 3

    Stir in beef stock and sherry; season with salt and pepper, to taste. Cover and cook on high heat for 2-3 hours, or until heated through. Remove and discard thyme and bay leaf.

  4. 4

    Preheat oven to broil.

  5. 5

    Place baguette slices onto a baking sheet. Place into oven and broil until golden brown on both sides, about 1-2 minutes per side; set aside.

  6. 6

    Divide soup into ramekins or ovenproof bowls. Place onto a baking sheet. Top with baguette slices to cover the surface of the soup completely; sprinkle with cheeses. Place into oven and broil until golden brown and cheeses have melted; about 2 minutes.

  7. 7

    Serve immediately.

Slow Cooker French Onion Soup

Slow Cooker French Onion Soup

4.8(28)620 min8 servings

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Ratings & Reviews

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Exceptional

Based on 28 ratings

damndelicious.net
4.8(28 reviews)
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About this Recipe

Imagine rich, deeply caramelized onions swimming in a savory broth, topped with crusty bread and melted cheese—all with minimal effort. This Slow Cooker French Onion Soup recipe makes that dream a reality, letting your crockpot do almost all the work to achieve a truly memorable dish.

The beauty of this recipe lies in its set-it-and-forget-it approach. The low, slow heat of the slow cooker gently coaxes the sweet onions to develop incredible depth and natural sweetness, building a complex flavor foundation for the soup without constant stirring. This hands-off technique ensures perfectly tender, deeply flavored onions that are the hallmark of great French onion soup.

You can expect a luxurious, restaurant-quality French Onion Soup experience right in your home. The thinly sliced sweet onions will transform into tender, golden strands, imparting a profound, savory-sweetness to the rich beef stock. With a hint of sherry vinegar to brighten the flavors and a bay leaf and fresh thyme adding aromatic complexity, each spoonful offers warmth and comfort. Topped with hearty slices of French baguette and a generous, bubbling blanket of melted Gruyère and Asiago cheeses, it's an utterly satisfying and impressive dish that tastes like it simmered for days.

While sweet onions are ideal for their natural sugar content, yellow onions can be substituted if needed, though they might yield a slightly less sweet base. For the decadent cheese topping, if Gruyère or Asiago aren't available, you can experiment with other good melting cheeses like provolone or Swiss to achieve a similar golden, bubbly crust.

This comforting Slow Cooker French Onion Soup is perfect as a cozy starter for an elegant dinner or a hearty main course on a chilly evening. Serve it bubbling hot, directly from oven-safe crocks for that classic, inviting presentation.

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