French Onion Soup Au Gratin Recipe
Make French Onion Soup Au Gratin Recipe in just 1h . Get the full recipe with step-by-step instructions at pekinthechef.com.
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Ingredients
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Soup Ingredients
Gratin Topping Ingredients
Method
Soup Preparation
- 1
Sauté Onions
In a large, heavy-bottomed pot, melt the butter and olive oil over medium heat. Add the sliced onions and cook, stirring frequently, until they are caramelized and golden brown, about 25-30 minutes.
- 2
- 3
Deglaze the Pot
Pour in the dry white wine, scraping the bottom of the pot to release any browned bits. Allow the wine to reduce by half, about 5 minutes.
- 4
Add Broth and Herbs
Stir in the beef broth, thyme leaves, bay leaf, salt, and black pepper. Bring the mixture to a simmer and cook for 20 minutes, allowing the flavors to meld.
- 5
Remove Bay Leaf
After 20 minutes, remove the bay leaf from the pot and adjust seasoning if necessary.
Gratin Assembly
- 6
Prepare Bread
While the soup is simmering, preheat your oven to 400°F (200°C). Place the sliced baguette on a baking sheet and toast in the oven for about 5-7 minutes until lightly golden.
- 7
Assemble Soup Bowls
Ladle the soup into oven-safe bowls, leaving some space at the top for the bread and cheese.
- 8
Add Bread and Cheese
Place one or two toasted baguette slices on top of each bowl of soup. Generously sprinkle the Gruyère and Parmesan cheese over the bread.
- 9
Broil the Soup
Place the assembled bowls on a baking sheet and broil in the oven for 5-7 minutes, or until the cheese is bubbly and golden brown.
- 10