Onion Soup(Crock-Pot)
A rich and comforting onion soup with caramelized onions, savory beef broth, and melted cheese, perfect for cozy gatherings and classic French-inspired meals.
Ingredients
Instructions
- Saute onions in a covered skillet until soft.
- Uncover; add salt and sugar.
- Cook for 15 minutes.
- Stir in flour and cook for 3 minutes longer.
- Combine onions, beef stock, and white wine in a crock-pot.
- Cook on low for 6 to 8 hours.
- Serve with toasted rounds of French bread topped with cheese.
- If using earthenware bowls, fill with soup.
- Top with toasted bread.
- Sprinkle with cheese and place under preheated broiler for 2 to 3 minutes.
- Alternatively, toast the bread, sprinkle with cheese, broil, and then place on top of the soup served in standard bowls.
Tips & Substitutions
For richer flavor, consider using a mix of yellow and sweet onions. If you want to reduce the fat, substitute half the butter with olive oil. Also, if you don’t have white wine, a splash of apple cider vinegar can add acidity. For a vegetarian version, replace beef stock with vegetable broth and use a non-dairy butter alternative.
Serving Suggestions
This onion soup pairs beautifully with toasted French bread topped with melted Parmesan cheese. For a complete meal, serve it alongside a simple green salad or a hearty sandwich. You can also add a dash of balsamic vinegar for extra flavor or serve with a side of Spicy Beef With Mint for a satisfying contrast.
Storage & Reheating
Leftover onion soup can be stored in an airtight container in the refrigerator for up to 3 days. To reheat, slowly warm it on the stove over medium heat, adding a splash of water if it thickens too much. Alternatively, microwave in a covered bowl, stirring occasionally for even heating.
Nutrition & Diet Analysis (per serving)
Each serving of Onion Soup(Crock-Pot) contains roughly 415 calories, with 7g protein, 51g carbohydrates, and 20g fat. It is a good source of protein (15% of the Daily Value), iron (12% of the Daily Value), and dietary fiber (10% of the Daily Value). Note that it is relatively high in sodium, at 1015mg per serving (44% 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 this soup in advance?
Yes, this onion soup can be made in advance and stored in the refrigerator. The flavors deepen as it sits, making it even tastier the next day. Just reheat on the stove or in the microwave before serving.
What type of cheese works best for topping?
Parmesan cheese is traditional for topping onion soup, but Gruyère or Swiss cheese also melts beautifully and adds a rich flavor. Feel free to experiment with different cheeses based on your preference.
Can I freeze the soup?
Yes, you can freeze the onion soup before adding the bread and cheese. Allow it to cool completely, then store in freezer-safe containers for up to 3 months. Thaw 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).