French Onion Tomato Soup is a cozy fusion of two beloved comfort foods: the savory depth of French onion soup and the bright acidity of tomato soup. The caramelized onions provide rich, umami notes while the tomato base adds brightness. Topped with toasted French bread and melted Swiss cheese, this hearty bowl makes a warming meal perfect for cold evenings or casual dinner gatherings.
Ingredients
- ⅓ cup butter (or 1/4 cup)
- 4 yellow onions (large, sliced (or 3 large onions))
- 1 tbsp flour (scant)
- 1 ½ tsp salt (or 1 ¼ tsp)
- 12 oz tomatoes (1 can)
- 6 slices French bread (toasted )
- 2 cups Swiss cheese (grated )
Instructions
Step 1: Sauté Onions
- Melt butter in a large pot.
- Add sliced onions and sauté until golden, about 15 minutes.
Step 2: Make the Base
- Sprinkle flour over onions and cook briefly.
- Add salt and tomatoes (including liquid).
- Simmer covered for 10 minutes.
Step 3: Blend and Heat
- Blend the mixture until smooth using a blender or food processor.
- Return to the pot and heat for 15 more minutes on low.
Step 4: Prepare to Serve
- Preheat broiler.
- Pour hot soup into 6 heatproof bowls or a large shallow casserole.
- Place a slice of toasted French bread on top of each.
Step 5: Add Cheese and Broil
- Sprinkle grated Swiss cheese evenly over the bread.
- Place under the broiler for 3–5 minutes, or until the cheese melts and begins to brown.
Tips
- Use Gruyère for a nuttier flavor in place of Swiss.
- Add a dash of Worcestershire sauce for extra umami.
- Substitute canned fire-roasted tomatoes for a smokier profile.
- For a vegetarian version, ensure cheese and broth are veg-friendly.
- Serve with a green salad for a complete meal.
Nutrition
Calories: 412kcalCarbohydrates: 55gProtein: 19gFat: 13gSaturated Fat: 7gPolyunsaturated Fat: 1gMonounsaturated Fat: 3gTrans Fat: 0.03gCholesterol: 35mgSodium: 640mgPotassium: 366mgFiber: 4gSugar: 13gVitamin A: 774IUVitamin C: 13mgCalcium: 408mgIron: 3mg
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