How to make onion soup recipe Ingredients 4 Chopped onions 3 Tablespoons of butter 3 Tablespoons of flour Black pepper and salt to taste 1 Teaspoon white sugar 2 Cups of meat broth 1 1/2 Cups of water ½ Teaspoon dried parsley ½ Teaspoon dried thyme 1 French baguette, cut into 1/2-inch slices ½ Grated mozzarella cheese Preparation In a large saucepan over