Jul 14 2026
RestaurantsBern's Steak HouseFrench Onion Soup Au Gratin Recipe

French Onion Soup Au Gratin Recipe

Inspired by Bern's Steak House
Time1h 15m
Serves4

garlic and spelt toasts

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Ingredients

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Soup Ingredients

Spelt Toasts

Method

Soup Preparation

  1. 1

    Caramelize the Onions

    In a large pot, heat the butter and olive oil over medium heat. Add the sliced yellow onions and cook, stirring occasionally, for about 30-40 minutes until the onions are deep golden brown and caramelized.

  2. 2

    Add Garlic and Deglaze

    Add the minced garlic to the pot and cook for an additional 2 minutes. Pour in the dry white wine, scraping the bottom of the pot to deglaze. Let it simmer until the wine reduces by half.

  3. 3

    Add Broth and Seasonings

    Stir in the beef broth, thyme leaves, bay leaf, salt, and black pepper. Bring the soup to a gentle simmer and let it cook for about 20 minutes.

  4. 4

    Prepare for Baking

    Remove the bay leaf and ladle the soup into oven-safe bowls. Top each bowl with shredded Gruyère and grated Parmesan cheese.

  5. 5

    Broil the Soup

    Place the bowls under the broiler in your oven for about 5-7 minutes, or until the cheese is bubbly and golden brown.

Spelt Toast Preparation

  1. 6

    Toast the Bread

    While the soup is broiling, brush the spelt bread slices with olive oil and place them on a baking sheet. Bake in the oven at 375°F (190°C) for 10-12 minutes, or until they are golden and crispy.

  2. 7

    Garlic Rub

    Once toasted, take the whole garlic cloves and rub them over the warm spelt toasts to impart a subtle garlic flavor.

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