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Slow Cooker French Onion Soup Recipe with Gruyère Croutons Easy and Cozy

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A cozy and easy slow cooker French onion soup featuring caramelized onions and melty Gruyère croutons, perfect for comforting weeknight meals.

Ingredients

Scale
  • 6 large yellow onions, thinly sliced
  • 4 tablespoons unsalted butter
  • 6 cups beef broth
  • 1/2 cup dry white wine (optional)
  • 3 garlic cloves, minced
  • 2 teaspoons fresh thyme, chopped (or 1 teaspoon dried thyme)
  • 2 bay leaves
  • Salt and freshly ground black pepper, to taste
  • 1 baguette, cut into 1/2 inch thick rounds
  • 2 cups Gruyère cheese, grated

Instructions

  1. Slice the onions thinly using a sharp knife; this should take about 10 minutes.
  2. Melt 4 tablespoons of unsalted butter in a large skillet over medium heat. Add the sliced onions and cook, stirring occasionally, for about 15-20 minutes until golden brown and fragrant.
  3. Transfer the caramelized onions to the slow cooker. Add 6 cups beef broth, 1/2 cup dry white wine (optional), 3 minced garlic cloves, 2 teaspoons fresh thyme (or 1 teaspoon dried), and 2 bay leaves. Season with salt and pepper to taste. Stir gently to combine.
  4. Cover and cook on low for 6-8 hours or on high for 3-4 hours. Stir gently about halfway through cooking.
  5. Preheat the oven broiler. Arrange baguette slices on a baking sheet and toast until lightly golden, about 2-3 minutes per side.
  6. Pile grated Gruyère cheese generously on the toasted baguette slices. Broil for another 1-2 minutes until the cheese is bubbly and golden brown.
  7. Ladle the hot soup into oven-safe bowls. Top each bowl with a Gruyère crouton and optionally broil for a minute to melt the cheese further.
  8. Remove bay leaves before serving. Sprinkle extra fresh thyme or cracked pepper if desired.

Notes

Add a pinch of sugar to onions if they are not caramelizing well. Stir soup halfway through cooking to prevent sticking. Use gluten-free bread for a gluten-free version. Substitute beef broth with vegetable or mushroom broth for a vegetarian version. Watch croutons carefully under the broiler to avoid burning.

Nutrition

Keywords: slow cooker, French onion soup, Gruyère croutons, caramelized onions, comfort food, easy soup, cozy recipe

Find it online: https://eliplate.com/slow-cooker-french-onion-soup-recipe-with-gruy-e-re-croutons-easy-and-cozy/