Why it works: Pepper and lemon 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 ↓
To Make a Strong Fish Gravy
Ingredients
Directions
Prepare the eels
Skin, gut, and wash the eels, then cut them into small pieces.
Place the eel pieces in a saucepan and cover with water.
Make the rich gravy
Add the toasted bread, mace, whole pepper, sweet herbs, and lemon peel.
Boil the mixture until it is rich.
Finish the gravy
In a separate saucepan, melt the butter.
Add a little flour to the melted butter and stir until brown.
Strain the rich gravy into the butter mixture and let it boil for a few minutes.
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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Pepper + lemontop 3% of all pairsSmell alikestrongCooked together27,047 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
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Bread + buttertop 7% of all pairsSmell alikemoderateCooked together27,232 recipes
Shared aroma: delta-decalactone (sweet, creamy).
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Lemon + walnuttop 10% of all pairsSmell alikestrongCooked together2,149 recipes
Shared aroma: 2-nonenal (fatty, green).
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Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Walnut + flourtop 12% of all pairsSmell alikemoderateCooked together5,873 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
What each ingredient does
- Eels
- Provide the main flesh and body that give the gravy its rich, savory character.
- Butter
- Adds fat and richness, and carries the flour for a smooth, flavorful base.
- Flour
- Thickens the butter when cooked, helping the strained gravy become smooth and body-rich.
- Toasted bread
- Adds toasty aroma and body to the liquid as it simmers.
The step that matters
Stirring the flour into the melted butter until brown. Flour cooked in fat forms a roux that thickens and browns the gravy. Cooking it too briefly leaves a raw floury taste, while over-browning can scorch it and make the gravy bitter.
Swap the mace
How well each one fits the dish's main ingredients (bread, pepper, lemon, butter, walnut, flour):
- Parsleyfits better
- Sagefits better
- Marjoramfits better
- Macethe original
Fit is the average pairing score against bread, pepper, lemon, butter, walnut, flour. 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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