French Onion Soup
"Deeply caramelized onions in rich beef broth, topped with a crusty bread cap and a blanket of melted Gruyere. Costco France sells this ready-to-heat — yours will be better because you'll caramelize the onions properly instead of whatever shortcuts they're taking."
Costco Copycat — This is a homemade version of the Costco International Flavors item. See it in store →
The Game Plan
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Slice all onions into thin half-moons. This is the boring part. It's worth it.
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Melt butter with olive oil in a large Dutch oven over medium heat. Add onions and sugar, stir to coat. Cook 40-45 minutes, stirring every 5 minutes, until deeply golden brown and jammy. Don't rush this — low and slow is the whole point.
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Add garlic and flour, stir for 1 minute. Pour in wine and scrape up the browned bits.
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Add beef broth, bay leaves, and thyme. Simmer 15 minutes. Season with salt and pepper. Discard bay leaves and thyme stems.
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Ladle soup into oven-safe bowls. Float a slice of bread on each. Pile shredded Gruyere on top.
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Broil 3-5 minutes until cheese is bubbly, golden, and draping over the sides of the bowl.
