Why it works: Lemon and pepper match in chemistry and in kitchens. They rank in the top 3% of all ingredient pairs, and cooks put them together in 27,047 recipes. Both carry trans-2-nonenal, which smells cardboard, fatty. The science ↓
String-beans
Ingredients
Directions
Prepare the beans
Wash the string beans and cut them diagonally into small strips.
Boil the beans in salted water for 10 minutes or until tender.
Drain the beans and transfer them to cold water.
Finish and serve
Melt the butter in a pan over medium heat, then squeeze the lemon juice into the melted butter.
Drain the beans again and add them to the hot butter.
Heat the beans quickly, seasoning with salt and pepper.
Serve immediately, omitting lemon juice if not desired.
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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Lemon + peppertop 3% of all pairsSmell alikestrongCooked together27,047 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
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Beans + peppertop 11% of all pairsSmell alikemoderateCooked together4,733 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Beans + lemontop 12% of all pairsSmell alikestrongCooked together1,474 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
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Butter + lemontop 16% of all pairsSmell alikemoderateCooked together41,227 recipes
Shared aroma: 3-hexenal (apple, fruity).
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Beans + buttertop 19% of all pairsSmell alikemoderateCooked together2,799 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- String beans
- Provide the main vegetable body and fresh, crisp-tender texture when cooked briefly.
- Butter
- Adds fat and rich flavor, coating the beans and carrying seasoning.
- Lemon juice
- Adds acidity that brightens the flavor of the buttered beans.
The step that matters
Boil the beans until just tender. Boiling too long turns the beans soft and dull in color, while stopping too early leaves them fibrous. Checking for tenderness at the stated time helps keep them crisp-tender before they are finished in butter.
Swap the beans
How well each one fits the dish's main ingredients (butter, lemon, pepper):
- Chickpeafits better
- Walnutfits about as well
- Pistachiofits about as well
- Beansthe original
Fit is the average pairing score against butter, lemon, pepper. 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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