Onion Soup
Onion soup is a classic French dish known for its rich, savory flavors and comforting warmth. Caramelized onions bring a natural sweetness that pairs beautifully with the depth of beef broth. Perfect for chilly evenings, this dish suits anyone seeking a hearty, satisfying meal.
Ingredients
Instructions
- Cook onions in butter and oil for 15 minutes in a Dutch oven, stirring occasionally.
- Add sugar and cook for an additional 15 minutes until the onions are brown.
- Sprinkle onions with flour; blend in hot broth, white wine, and seasonings.
- Simmer the mixture for 30 minutes.
- Lightly toast French bread in a 350° oven for 20 minutes.
- Baste each slice of bread with 1/2 teaspoon of vegetable oil and garlic.
- Serve the soup with toast floating on top and sprinkle the toast with cheese.
- Bake for 15 minutes.
- Serve hot.
Tips & Substitutions
For a deeper flavor, consider using a mix of yellow and sweet onions. If you prefer a gluten-free option, substitute the flour with cornstarch or a gluten-free flour blend. You can also enhance the soup by adding fresh herbs like thyme or bay leaves during simmering. For a vegetarian version, replace beef broth with vegetable broth and omit the wine or use a non-alcoholic substitute.
Serving Suggestions
Serve the onion soup in bowls with a slice of toasted French bread floating on top, and sprinkle with grated cheese, such as Gruyère or mozzarella, before serving. This dish pairs beautifully with Quick Swedish Meatballs for a hearty meal. A simple green salad or a light vinaigrette can complement the rich flavors of the soup.
Storage & Reheating
Leftover onion soup can be stored in an airtight container in the refrigerator for up to 3 days. To reheat, pour the soup into a pot and warm it over medium heat, stirring occasionally. If you want to reheat it in the microwave, use a microwave-safe bowl, covering it loosely to prevent splatter, and heat in short intervals until hot.
Nutrition & Diet Analysis (per serving)
Each serving of Onion Soup contains roughly 1014 calories, with 2g protein, 21g carbohydrates, and 101g fat. It is an excellent source of vitamin A (167% of the Daily Value). Note that it is relatively high in sodium, at 1156mg per serving (50% of the Daily Value).
Estimated from ingredients & per-serving nutrition — verify against package labels for allergies or strict diets.
* % Daily Values based on a 2,000 calorie diet (FDA 2020).
Frequently Asked Questions
Can I make onion soup in advance?
Yes, onion soup can be made a day ahead. Allow it to cool completely before refrigerating. When ready to serve, reheat on the stove, adding a splash of water or broth if it thickens too much.
What type of cheese is best for topping onion soup?
Traditionally, Gruyère cheese is used for its excellent melting properties and rich flavor. However, you can also use mozzarella or Swiss cheese as alternatives, depending on your preference.
Can I freeze onion soup?
Yes, onion soup freezes well. Allow it to cool, then transfer it to freezer-safe containers. It can be stored for up to 3 months. Thaw overnight in the refrigerator before reheating.
Nutrition is estimated from USDA FoodData Central ingredient data and may vary with brand, portion and preparation — see our methodology. This information is for general educational purposes only and is not medical or dietary advice (disclaimer).