Why it works: Onion and potato are a kitchen classic. They rank in the top 3% of all ingredient pairs, and cooks put them together in 9,023 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Stewed Codfish with Eggs
Ingredients
Directions
Make the sauce
Boil the milk in a pot.
Add the boiled potatoes, flour, butter, parsley, onion, pepper, and Worcestershire sauce.
Stir until the mixture thickens.
Finish the dish
Add the codfish and quartered hard boiled eggs.
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.
-
Onion + potatotop 3% of all pairsSmell alikemoderateCooked together9,023 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Parsley + potatotop 5% of all pairsSmell alikemoderateCooked together2,855 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Butter + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
-
Parsley + oniontop 9% of all pairsSmell alikemoderateCooked together25,843 recipes
Shared aroma: 2,4-decadienal (seaweed).
-
Milk + potatotop 9% of all pairsSmell alikemoderateCooked together3,611 recipes
Shared aroma: (e,z)-2,6-nonadienal (cucumber, melon).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Codfish
- Forms the main body of the dish, providing flaky protein and savory flavor.
- Milk
- Forms the liquid base of the sauce, adding creaminess and body as it thickens.
- Flour
- Thickens the milk into a smooth sauce by swelling with heat and binding the liquid.
- Butter
- Adds richness and fat that gives the sauce a smooth, rounded mouthfeel.
- Hard boiled eggs
- Add substance and a firm, mild texture that complements the fish and sauce.
- Potatoes
- Add starch and body, helping the dish feel hearty and filling.
The step that matters
Stir until the mixture thickens. Flour must be cooked in the hot milk while stirring, so starch granules swell evenly and the sauce thickens smoothly without lumps or a raw floury taste.
Swap the onion
How well each one fits the dish's main ingredients (butter, egg, parsley, flour, milk, sauce, potato):
- Chivefits better
- Shallotfits better
- Asparagusfits better
- Onionthe original
Fit is the average pairing score against butter, egg, parsley, flour, milk, sauce, potato. 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.
You might also like
The free Flavor Lab newsletter: one surprising pairing a week and the molecular reason it works, in 60 seconds. No spam, unsubscribe anytime.
Prefer an account? Create a free account to save pairings and unlock the full chemistry.
Potato Croquettes255 recipes
Potato Rolls78 recipes
Potato Chips53 recipes
Sweet Potato Croquettes53 recipes