How to Make Slow Cooker Onion Soup Like A Professional

Updated
2 min read

Slow cooker onion soup –French Onion Soup is a classic dish that warms the soul with its rich flavors and comforting aroma. This slow cooker version simplifies the cooking process while still delivering a deep, satisfying taste. Whether it’s a chilly day or you’re simply craving something heartwarming, this recipe is sure to please. Below you’ll find the ingredients and instructions to prepare this delightful soup.

Image of French Onion Soup

Here’s a glimpse of what your delicious French Onion Soup will look like once it’s ready to serve:

French Onion Soup in a bowl with melted cheese on top

Ingredients

Gather the following ingredients to create this delectable slow cooker French Onion Soup:

  • 4 large yellow onions, thinly sliced
  • 4 tablespoons unsalted butter
  • 1 teaspoon sugar
  • 4 cups beef broth
  • 1 cup dry white wine (or additional broth)
  • 2 teaspoons Worcestershire sauce
  • Salt and pepper to taste
  • 8 slices of French bread
  • 2 cups shredded Gruyere cheese (or a blend of your choice)

Instructions

Follow these straightforward steps to prepare your delightful French Onion Soup:

  1. In a large skillet over medium heat, melt the butter. Add the sliced onions and stir them to coat with the butter. Sprinkle with sugar to help caramelize them.
  2. Cook the onions for about 15-20 minutes, stirring occasionally until they turn golden brown. Be patient; this process is essential for developing flavor.
  3. Once the onions are caramelized, transfer them to your slow cooker. Pour in the beef broth, white wine, Worcestershire sauce, and season with salt and pepper.
  4. Cover and cook on low for 6-8 hours, or high for 3-4 hours, until all the flavors meld together.
  5. When ready to serve, preheat your oven broiler. Place the slices of French bread on a baking sheet and toast them until golden.
  6. Fill oven-safe bowls with the soup, top each with a slice of toasted bread, and generously sprinkle with Gruyere cheese.
  7. Broil for about 2-3 minutes or until the cheese is melted and bubbly.
  8. Serve immediately and enjoy the heartwarming flavors of homemade French Onion Soup!

This slow cooker recipe not only saves time but also allows the flavors to deepen beautifully. Enjoy the process and the final result!