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French Onion Soup IX

"Thickly sliced onions are slowly cooked in butter, then combined with beef broth and Romano cheese before being ladled into bowls, and topped with toast and cheese."

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Why it works: Romano cheese and gruyere cheese share more aroma than cooks usually use. They rank in the top 1% of all ingredient pairs, and 5 recipes mention both. Both carry ethyl 2-methylbutyrate, which smells fruity, apple. The science ↓

The recipe

8 servings
Prep15 min
Cook20 min

Ingredients

Contains: milk, wheat (auto-detected from the ingredients and method; we can miss things, so check labels)

Directions

Method written by CompKitchen from the ingredient list. Not the original author's method, not kitchen-tested.

  1. Melt the butter in a large heavy pot over medium heat. Add the sliced onions and cook, stirring often, for about 10 minutes until softened and golden.

  2. Raise the heat to medium-high and cook 3 more minutes, stirring, until the onions are deeper brown at the edges without burning.

  3. Pour in the beef broth and beef consomme and bring to a boil. Reduce the heat and simmer uncovered for 7 minutes. Season with salt and pepper to taste.

  4. Preheat the broiler on high, about 500°F (260°C). Ladle the hot soup into 8 broiler-safe bowls or crocks set on a baking sheet.

  5. Top each bowl with a slice of toasted French bread. Sprinkle with the grated Romano and shredded Gruyere cheese.

  6. Broil 2 to 3 minutes, watching closely, until the cheese is melted and bubbling. Serve hot.

By allrecipes. Recipe from Open Recipes.

Explore the science

The flavor team

The pairs that carry this dish. Each one is judged two ways: how much aroma chemistry they share, and how many recipes mention both.

  1. Aroma overlapstrong
    Mentioned together5 recipes

    Shared aroma: ethyl 2-methylbutyrate (fruity, apple).

  2. Butter + breadtop 3% of all pairs
    Aroma overlapstrong
    Mentioned together27,145 recipes

    Shared aroma: delta-decalactone (sweet, creamy).

  3. Onion + beeftop 3% of all pairs
    Aroma overlapmoderate
    Mentioned together17,091 recipes

    Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).

  4. Butter + gruyere cheesetop 3% of all pairs
    Aroma overlapstrong
    Mentioned together323 recipes

    Shared aroma: gamma-decalactone (peach, creamy).

  5. Beef + peppertop 4% of all pairs
    Aroma overlapstrong
    Mentioned together18,971 recipes

    Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs