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French Onion Soup with Gruyère Toasts

French Onion Soup with Gruyère Toasts


  • Author: BeauCollier
  • Total Time: 1 hr 10 mins

Description

Get ready to fall head over spoon for the most iconic bowl of comfort: French Onion Soup. With golden onions simmered low and slow in rich broth and topped with crisp, gooey Gruyère toasts, this is Parisian café magic made right in your kitchen. Elegant yet cozy, it’s the ultimate recipe for a quiet night in, a romantic dinner, or simply treating yourself to something soulful and deeply satisfying.


Ingredients

Scale
  • 2 tbsp butter

  • 2 tbsp olive oil

  • 4 large yellow onions, thinly sliced

  • 1 tsp salt

  • ½ tsp sugar

  • 2 garlic cloves, minced

  • ½ cup dry white wine (or ¼ cup broth)

  • 1 tbsp flour (optional)

  • 6 cups beef or vegetable broth

  • 1 tsp thyme (fresh or ½ tsp dried)

  • 1 baguette, sliced

  • 1½ cups shredded Gruyère cheese

  • Fresh black pepper to taste


Instructions

  1. Caramelize Onions (35–40 mins): In a heavy pot, heat butter and oil over medium-low. Add onions, salt, and sugar. Stir every 5–7 minutes until deep golden brown.

  2. Add Garlic & Flour (2 mins): Stir in garlic and flour, cooking just until fragrant.

  3. Deglaze (2 mins): Add wine, scraping up browned bits. Simmer until wine reduces slightly.

  4. Simmer (20 mins): Add broth and thyme. Bring to a boil, then simmer uncovered. Season with pepper.

  5. Prepare Toasts (while soup simmers): Toast baguette slices. Top with Gruyère and broil until bubbly and golden.

  6. Serve: Ladle soup into bowls. Top with cheesy toasts. Let soak slightly for maximum comfort.

Notes

  • Low and slow is key to perfect caramelization.

  • Toast baguette slices twice for better cheese grip.

  • Use Gruyère for classic flavor, or sub Swiss/Comté.

  • Store soup and toasts separately for the best leftovers.

  • Prep Time: 10 mins
  • Cook Time: 1 hour

Nutrition

  • Calories: 390
  • Fat: 22g
  • Carbohydrates: 32g
  • Protein: 14g