Why it works: Butter and bread are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 27,232 recipes. Both carry delta-decalactone, which smells sweet, creamy. The science ↓
Fish Croquettes
Ingredients
Directions
Prepare the filling
Boil the fish in hot water until cooked, then let it cool and flake into pieces.
In a double boiler, heat the milk, butter, and flour mixed with a little cold water until smooth.
Remove from heat, add the egg yolks and flaked fish, and season with salt and pepper. Mix thoroughly and let the mixture cool completely.
Shape and fry
Form the mixture into cylinder-shaped croquettes.
Dip each croquette in egg, then coat with bread crumbs.
Fry in hot oil until golden brown.
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.
Photo for illustrative purposes only · Contact us to use it
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.
-
Butter + breadtop 7% of all pairsSmell alikemoderateCooked together27,232 recipes
Shared aroma: delta-decalactone (sweet, creamy).
-
Milk + buttertop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
-
Fish + breadtop 10% of all pairsSmell alikemoderateCooked together1,668 recipes
Shared aroma: 2-undecenal (sweet).
-
Milk + breadtop 11% of all pairsSmell alikemoderateCooked together11,466 recipes
Shared aroma: 2-undecenal (sweet).
-
Fish + buttertop 12% of all pairsSmell alikemoderateCooked together4,488 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- White fish
- Provides the main body and flavor of the croquettes.
- Flour
- Thickens the milk mixture so it holds together when cooled and shaped.
- Egg yolks
- Add richness and help bind the filling as it sets.
- Milk
- Forms a smooth, creamy base that keeps the filling moist.
- Butter
- Adds fat for richer flavor and a softer texture.
The step that matters
Cool the mixture completely before shaping. A warm filling is too soft to hold its cylinder shape and can break apart or leak in hot oil. Full cooling lets the starch-thickened mixture firm up so the croquettes keep their form while frying.
“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.

Brown Bread461 recipes
Fried Fish120 recipes
White Bread80 recipes
Scalloped Cod69 recipes