Why it works: Tarragon and lemon match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 1,137 recipes. Both carry beta-phellandrene, which smells minty, terpene. The science ↓
Butter Beans
Ingredients
Directions
Prepare the beans
Soak the butter beans in water for 24 hours.
Simmer the beans gently for 3 hours.
Strain the beans and place them in a hot dish.
Make the sauce
Melt the butter and allow it to cool.
Add the egg yolks, vinegar, and lemon juice to the butter.
Stir the mixture briskly over low heat until thickened.
Serve
Pour the sauce over the beans and serve hot.
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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Tarragon + lemontop 1% of all pairsSmell alikestrongCooked together1,137 recipes
Shared aroma: beta-phellandrene (minty, terpene).
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Tarragon + vinegartop 7% of all pairsSmell alikemoderateCooked together2,547 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Beans + tarragontop 8% of all pairsSmell alikestrongCooked together92 recipes
Shared aroma: linalool (floral, citrus).
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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).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Butter beans
- Form the main body of the dish, giving it bulk and a soft, tender texture after long simmering.
- Egg yolks
- Thicken the sauce as they set gently with heat, giving it a smooth, emulsified body.
- Butter
- Adds richness and fat, helping the sauce feel smooth and creamy on the beans.
- Tarragon
- Contributes a distinct aromatic, slightly anise-like flavour to the dish.
The step that matters
Stir the egg yolk sauce over low heat. Egg yolks begin to set around 65 to 70 degrees Celsius and can scramble if overheated. Gentle, constant stirring over low heat keeps the sauce smooth and thickened rather than grainy.
Swap the beans
How well each one fits the dish's main ingredients (butter, egg, tarragon, lemon, vinegar):
- Walnutfits better
- Almondfits better
- Pistachiofits better
- Beansthe original
Fit is the average pairing score against butter, egg, tarragon, lemon, vinegar. 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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