Why it works: Butter and parsley are a kitchen classic. They rank in the top 15% of all ingredient pairs, and cooks put them together in 28,563 recipes. Both carry trans-2-hexenal, which smells green, leafy. The science ↓
Lobstbrs, Crabs, Prawns, and Shrimps, to Boil
Ingredients
Directions
Prepare
Choose lobsters by weight; males are preferred for eating, females for sauce.
In a tin pot, bring water to a boil and add 1 tablespoon of coarse sea salt for every quart of water.
Boil
Add the lobsters and cover immediately to maintain a rapid boil.
Boil for 30 to 60 minutes, depending on size, until they turn bright scarlet.
Skim the saucepan frequently and wipe any scum off the lobsters.
Finish and serve
Rub the shells with fresh butter or sweet oil for a glossy finish.
Before serving, crack the claws and cut the tail down the middle, laying it open on a dish with the head upright and claws at each end.
Garnish with parsley and serve with oil, vinegar, and cayenne.
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 + parsleytop 15% of all pairsSmell alikemoderateCooked together28,563 recipes
Shared aroma: trans-2-hexenal (green, leafy).
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Parsley + vinegartop 16% of all pairsSmell alikemoderateCooked together6,477 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Lobster + buttertop 18% of all pairsSmell alikemoderateCooked together2,609 recipes
Shared aroma: 2,6-nonadienal (cucumber, green).
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Butter + vinegartop 23% of all pairsSmell alikemoderateCooked together13,513 recipes
Shared aroma: isoamyl acetate (banana, pear).
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Lobster + parsleytop 24% of all pairsSmell alikelowCooked together890 recipes
Shared aroma: octanal (fat, soap).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Lobsters
- The main protein; its shell and flesh set during the rapid boil.
- Coarse sea salt
- Seasons the boiling water so the lobster meat is lightly flavoured as it cooks.
- Fresh butter or sweet oil
- Adds fat and a glossy sheen to the cooked shells.
The step that matters
Keep the boil rapid after adding the lobsters. Cover the pot immediately so the water returns to a boil quickly. A slow, weak boil cooks the lobster unevenly and can leave the meat tough or undercooked near the shell.
Swap the parsley
How well each one fits the dish's main ingredients (lobster, butter, vinegar):
- Tarragonfits better
- Capersfits about as well
- Parsleythe original
- Garlicfits about as well
Fit is the average pairing score against lobster, butter, 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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