Costco French Onion Soup
Craving a classic French Onion Soup but short on time? Try Costco’s version! This affordable and convenient soup is packed with traditional ingredients like broth, slow-cooked onions, croutons, and Swiss cheese. Precooked and frozen to preserve flavor, it’s easy to prepare in the oven, microwave, air fryer or pot. With no artificial flavors or colors, it’s a delicious and time-saving alternative to homemade.
Equipment
- 1 Oven (one of the options)
- 1 Microwave (one of the options)
- 1 Air fryer (one of the options)
- 1 Stove pot (one of the options)
- 1 Oven- or microwave-safe bowl
Ingredients
- 1 Costco's Cuisine Adventure French onion soup package
- 2 tbsp Swiss Cheese optional
- 2 slices Crusty French baguette optional
Instructions
Oven instructions (recommended)
- Preheat oven to 400 °F
- Place soup in ovenproof bowl with cheese on top.
- Bake for 50-60 minutes until it reaches 165 °F and cheese is golden brown.
Microwave instructions
- Place soup in microwave-safe bowl with cheese on top.
- Microwave on high for 3 minutes.
- Stir and microwave additional 2 minutes.
Quick oven-microwave instructions
- Preheat oven to 400 °F
- Place soup in ovenproof and microwave proof bowl with cheese on top.
- Microwave on high for 3 minutes (1200 W)
- Bake for 20 minutes until it reaches 165 °F and cheese is golden brown.
Stove pot instructions
- Place soup in a pot with cheese on top.
- Cook on medium heat until it starts melting. Stir occasionally.
- When boiling, reduce to low heat and stir frequently. Cook for another 5-10 mins until fully melted and hot.
Air fryer instructions
- Preheat air fryer to 400 °F.
- Place soup in ovenproof bowl with cheese on top.
- Heat for about 30 minutes.
- Stir and heat for another 15 minutes, check regularly.
Notes
Always put cheese side up.
You can enhance the flavor of Costco’s French Onion Soup by adding croutons, bread, or extra Swiss cheese. You can also add herbs and spices like thyme, garlic pepper, cayenne, bay leaf and salt if you find the soup too bland.
You can add more texture by adding crusty bread on top. This adds a nice crunch to the dish and also helps to soak up some of the soup’s delicious flavors. You can use any type of bread slices you like, but a crusty French baguette or sourdough bread works particularly well. Simply slice the bread and toast it lightly before placing it on top of the soup. You can also try rubbing the bread with a clove of garlic before toasting for extra flavor. Try adding a bit of olive oil on top.
Nutrition
Calories: 241kcalCarbohydrates: 30gProtein: 11gFat: 8gSaturated Fat: 4gPolyunsaturated Fat: 1gMonounsaturated Fat: 2gCholesterol: 19mgSodium: 428mgPotassium: 96mgFiber: 1gSugar: 3gVitamin A: 166IUCalcium: 244mgIron: 2mg
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