French Onion Soup
Deeply caramelized onions in a rich broth, topped with a toasted baguette and bubbling Gruyère: bistro comfort at home.
Prep15 min
Cook1 hr 10 min
Total1 hr 25 min
Yield4 servings
LevelMedium
French Onion Soup
Ingredients
US measurements with metric in parentheses.
Instructions
- Melt the butter in a large Dutch oven over medium heat. Add onions and salt and cook 40 to 50 minutes, stirring often, until deep brown and jammy. Add splashes of water if they stick.
- Add the garlic for 1 minute. Pour in the wine and scrape up the browned bits until nearly evaporated.
- Add the broth, thyme and bay leaf and simmer 20 minutes. Remove the herbs and season to taste.
- Heat the broiler. Ladle the soup into oven-safe bowls on a baking sheet. Top each with a toasted baguette slice and a mound of Gruyère.
- Broil 2 to 3 minutes until melted and bubbly. Serve carefully, because the bowls are very hot.
Tips for success
- Patience is the whole recipe; keep heat moderate.
- Use vegetable broth and skip the wine for a fully vegetarian soup.
Substitutions
- Swiss or provolone replace Gruyère.
- Replace wine with an extra splash of broth and 1 tsp sherry vinegar.
Storage & reheating
Refrigerate the soup up to 4 days; freezes well without the topping.
Estimated nutrition per serving
Estimate only. Calculated roughly from typical ingredients; real values vary by brand and portion.
| Calories | ~430 kcal |
|---|---|
| Protein | ~16 g |
| Carbohydrates | ~40 g |
| Fat | ~22 g |
Frequently asked questions
Why are my onions bitter?
They burned. Keep heat at medium-low and stir often.