Why it works: Parsley and lemon match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 14,037 recipes. Both carry beta-phellandrene, which smells minty, terpene. The science ↓
Sauce for Boiled Cod
Ingredients
Directions
In a pot, combine boiling water and milk.
Gradually stir in butter and flour mixed with cold water.
As the sauce thickens, add the chopped yolk of the boiled egg and the beaten raw egg.
Remove from heat and season with pepper, salt, parsley, and lemon juice.
Cover and let sit in boiling water (not over heat) for 5 minutes, stirring occasionally.
Pour some sauce over the fish and serve the rest in a separate dish.
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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Parsley + lemontop 1% of all pairsSmell alikestrongCooked together14,037 recipes
Shared aroma: beta-phellandrene (minty, terpene).
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Pepper + parsleytop 2% of all pairsSmell alikestrongCooked together34,122 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Pepper + lemontop 3% of all pairsSmell alikestrongCooked together27,047 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
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Milk + buttertop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
Butter and flour barely smell alike, yet cooks put them together in 124,287 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
Swap the parsley
How well each one fits the dish's main ingredients (milk, butter, flour, egg, pepper, lemon):
- Parsleythe original
- Nutmegfits about as well
- Cardamomfits about as well
- Cinnamonfits less well
Fit is the average pairing score against milk, butter, flour, egg, pepper, lemon. Candidates are from the same food group and used in at least 100 recipes.
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