Why it works: Butter and parmesan cheese are a kitchen classic. They rank in the top 9% of all ingredient pairs, and cooks put them together in 4,163 recipes. Both carry guaiacol, which smells smoky, sweet. The science ↓
To Boil Leeks
Ingredients
Directions
Prepare
Cut off the roots, green ends, and outer leaves of the leeks.
Cut the stalks into six-inch lengths.
Boil
In a saucepan of boiling water, add vinegar and salt.
Tie the leeks into bundles and boil gently until tender, about 45 minutes.
Drain well and serve on toast with white sauce poured over them.
Transcribed from a scanned cookbook and modernised for today's kitchens. Where the book gave no heat or time, or said "a moderate oven", the temperatures and times here may be modern equivalents rather than the book's own figures.
Explore the science
The flavor team
The pairs that carry this dish. Each one is judged two ways: how much their aromas overlap, and how often cooks already put them together.
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Butter + parmesan cheesetop 9% of all pairsSmell alikemoderateCooked together4,163 recipes
Shared aroma: guaiacol (smoky, sweet).
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Butter + saucetop 15% of all pairsSmell alikelowCooked together15,338 recipes
Shared aroma: ethanol (alcoholic, ethereal).
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Leek + buttertop 15% of all pairsSmell alikemoderateCooked together848 recipes
Shared aroma: trans-2-hexenal (green, leafy).
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Butter + eggtop 17% of all pairsSmell alikemoderateCooked together118,967 recipes
Shared aroma: decanal (soap, orange peel).
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Parmesan cheese + eggtop 18% of all pairsSmell alikemoderateCooked together3,368 recipes
Shared aroma: 1-octen-3-ol (mushroom, earthy).
Butter and sauce barely smell alike, yet cooks put them together in 15,338 recipes: they work on texture and structure more than aroma.
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Leeks
- The main vegetable, which becomes tender and mild when boiled slowly.
- White sauce
- Adds moisture and a creamy coating over the cooked leeks.
The step that matters
Boil gently until tender. Boiling vigorously can break up and bruise the leeks, while gentle simmering cooks the thick stalks evenly through to the core without falling apart.
Swap the leek
How well each one fits the dish's main ingredients (vinegar, butter, sauce, parmesan cheese, egg):
- Mustardfits better
- Asparagusfits better
- Capsicumfits better
- Leekthe original
Fit is the average pairing score against vinegar, butter, sauce, parmesan cheese, egg. Candidates are from the same food group and used in at least 100 recipes.
“What each ingredient does” and “The step that matters” were written by Claude from this recipe’s own method and reviewed in samples by CompKitchen.
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