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Easy French Onion Soup

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Easy French Onion Soup is a savory, comforting classic made with caramelized onions, rich beef broth, and a cheesy, toasted bread topping. This simple yet flavorful soup is perfect for cozy dinners or special occasions. With pantry staples and customizable options, it’s a dish that’s easy to prepare and guaranteed to impress. The depth of flavor in each spoonful makes this soup a beloved choice for any meal.

Ingredients

4 large yellow onions, thinly sliced

3 tbsp unsalted butter

1 tbsp olive oil

1 tsp sugar

1 tsp salt

2 cloves garlic, minced

4 cups beef broth (or chicken broth for a lighter flavor)

2 cups water

1/2 cup low-sodium beef broth (additional)

2 sprigs of fresh thyme (or 1/2 tsp dried thyme)

1 bay leaf

Salt and pepper to taste

46 slices of baguette, toasted

1 cup shredded Gruyère cheese (or a mix of Gruyère and Swiss)

Instructions

  • Caramelize the Onions: Heat butter and olive oil in a large pot over medium heat. Add sliced onions, sugar, and salt. Cook for 25-30 minutes, stirring occasionally, until the onions are deeply golden and caramelized.

  • Make the Soup Base: Stir in minced garlic and cook for 1-2 minutes. Add an additional 1/2 cup of beef broth and simmer for 2-3 minutes. Add the remaining broth, water, thyme, and bay leaf. Bring to a boil, then reduce heat and simmer for 20-25 minutes.

  • Prepare the Topping: Toast slices of baguette until golden. Ladle the soup into bowls, top with toasted bread, and sprinkle with shredded Gruyère cheese.

  • Broil: Place the bowls under a broiler until the cheese is melted and bubbly. Serve immediately.

Notes

For a vegetarian version, use vegetable broth and a splash of soy sauce for added depth.

Try different cheeses like mozzarella, fontina, or a blend of cheeses for variety.

Substitute gluten-free bread and check broth ingredients to make this dish gluten-free.

Add protein like shredded chicken or sausage for a heartier soup.

To store leftovers, place soup in an airtight container for up to 4 days or freeze (without bread and cheese) for up to 3 months.