Why it works: Parsnip and flour match in chemistry and in kitchens. They rank in the top 7% of all ingredient pairs, and cooks put them together in 669 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓
To Dress Salt Cod
Ingredients
Directions
Prepare the cod
Soak and clean the salt cod.
Lay the cod in water with vinegar overnight.
Boil the cod until cooked.
Break the cooked cod into flakes on a dish.
Make the parsnip cream
Boil the parsnips.
Beat the boiled parsnips in a mortar.
Rub butter with flour.
Mix the beaten parsnips with cream and the butter‑flour mixture.
Pour the parsnip mixture over the cod.
Serve.
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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Parsnip + flourtop 7% of all pairsSmell alikestrongCooked together669 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Cream + buttertop 8% of all pairsSmell alikemoderateCooked together41,516 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
-
Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Cream + flourtop 20% of all pairsSmell alikemoderateCooked together30,481 recipes
Shared aroma: acetaldehyde (pungent, ethereal).
-
Vinegar + buttertop 23% of all pairsSmell alikemoderateCooked together13,513 recipes
Shared aroma: isoamyl acetate (banana, pear).
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
- Salt cod
- Forms the main body of the dish, providing the flaked fish base.
- Parsnips
- Provide the bulk and natural sweetness of the creamy topping when boiled and beaten.
- Cream
- Adds moisture and richness, giving the parsnip mixture a smooth, silky texture.
- Butter
- Adds fat and richness, and with flour helps thicken and enrich the parsnip cream.
- Flour
- Thickens the mixture when rubbed with butter, giving the cream more body.
The step that matters
Soak the salt cod. Salt cod must be soaked long enough to draw out excess salt, otherwise the fish will taste overly salty. Changing the water and cleaning the fish first helps remove surface salt and impurities.
Swap the parsnip
How well each one fits the dish's main ingredients (vinegar, cream, butter, flour):
- Shallotfits better
- Chivefits better
- Mustardfits better
- Parsnipthe original
Fit is the average pairing score against vinegar, cream, butter, 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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