French onion soup is a classic comfort dish built on deeply caramelized onions and a rich beef broth. The secret to its signature dark color and sweet, savory flavor lies in cooking the onions low and slow until they turn a deep golden brown. A touch of dried thyme and a bay leaf add an earthy background note to the broth. It is finished with thick slices of toasted French bread and a generous layer of melted Gruyere and Parmesan cheese. Serve it on a chilly evening when you need a warming, satisfying meal.
Prep
1 hr 20 min
Cook
10 min
Servings
4
Course
Soup
Cuisine
Italian
Ingredients
2 tablespoons butter
4 medium onions, sliced
2 cans (10 ½ oz each) condensed beef broth
1 ½ cups water
⅛ teaspoon pepper
⅛ teaspoon dried thyme leaves
1 dried bay leaf
4 slices ( ¾ to 1 inch thick) toasted French bread
1 cup shredded Gruyère, Swiss or mozzarella cheese (4 oz)
¼ cup grated Parmesan cheese
Instructions
1Melt the butter in a 4-quart nonstick Dutch oven over medium-high heat. Add the sliced onions and stir to coat them evenly. Leave the pot uncovered and cook for 10 minutes, stirring every 3 to 4 minutes.
2Turn the heat down to medium-low. Continue cooking for 35 to 40 minutes, stirring thoroughly every 5 minutes. The onions will shrink significantly and turn a deep golden brown color.
3Pour in the beef broth and water, then add the pepper, dried thyme, and bay leaf. Bring the mixture to a boil, then lower the heat. Cover the pot and let it simmer for 15 minutes before taking out the bay leaf.