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Crockpot French Onion Soup Recipe

Crockpot French Onion Soup Recipe


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4.6 from 16 reviews

  • Total Time: 9 hours
  • Yield: 4 1x

Description

Warm, comforting Crockpot French Onion Soup brings classic French flavors to your kitchen with minimal effort. Caramelized onions, rich beef broth, and melted cheese create a soul-satisfying meal you’ll savor down to the last spoonful.


Ingredients

Scale

Main Ingredients:

  • 6 cups beef broth
  • 4 large onions, thinly sliced
  • 2 cups Gruyere cheese, shredded

Seasoning and Flavor Enhancers:

  • 2 tablespoons butter
  • 1 teaspoon dried thyme
  • 1 teaspoon sugar
  • Salt and pepper to taste

Serving Component:

  • French bread slices, toasted

Instructions

  1. Prepare a crockpot and melt butter, gently sautéing onions with sugar on high heat for approximately 4 hours, stirring occasionally to develop rich, golden-brown caramelization.
  2. Pour in broth and season with thyme, salt, and pepper, then reduce heat to low setting and allow soup to simmer and develop deep flavors for 4-5 hours.
  3. Transfer the aromatic soup carefully into oven-safe ceramic bowls, ensuring even distribution.
  4. Layer rustic bread slices across the soup’s surface, generously covering with grated cheese.
  5. Position bowls under broiler at high temperature for 2-3 minutes, watching closely until cheese transforms into a bubbly, golden-brown crust with crispy edges.

Notes

  • Caramelizing onions slowly develops deep, rich flavor and requires patience for the best results.
  • Using sweet Vidalia or yellow onions creates a more mellow, complex taste profile in the soup.
  • Choosing a good-quality crusty bread like sourdough or French baguette ensures a crispy, delicious topping.
  • Select a flavorful melting cheese such as Gruyère or Emmental for authentic French onion soup experience.
  • Prep Time: 4 hours
  • Cook Time: 5 hours
  • Category: Dinner, Appetizer
  • Method: Slow Cooking
  • Cuisine: French

Nutrition

  • Serving Size: 4
  • Calories: 320
  • Sugar: 1 g
  • Sodium: 900 mg
  • Fat: 20 g
  • Saturated Fat: 12 g
  • Unsaturated Fat: 8 g
  • Trans Fat: 0 g
  • Carbohydrates: 25 g
  • Fiber: 1 g
  • Protein: 14 g
  • Cholesterol: 60 mg