Why it works: Butter and milk are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 81,283 recipes. Both carry (z)-4-heptenal, which smells biscuit, cream. The science ↓
Salmon Croquettes
Ingredients
Directions
Make the white sauce
Melt the butter in a pan over medium heat.
Add the flour and mix well.
Slowly stir in the cold milk until thick and smooth.
Add salt and pepper, and boil for 2 minutes.
Shape and fry
Let the mixture cool, then stir in the salmon.
Add the beaten egg and enough cracker crumbs to shape into cakes.
Fry the cakes 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 + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
-
Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Flour + milktop 14% of all pairsSmell alikelowCooked together78,219 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Flour + eggtop 15% of all pairsSmell alikelowCooked together106,462 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Butter + salmontop 16% of all pairsSmell alikemoderateCooked together4,481 recipes
Shared aroma: 2,6-nonadienal (cucumber, 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
- Flour
- Thickens the milk into a smooth white sauce that holds the salmon together.
- Egg
- Binds the salmon and crumbs so the cakes keep their shape.
- Cracker crumbs
- Absorb moisture and give the cakes a structure that can be shaped and browned.
- Salmon
- Provides the main flavor and body of the croquettes.
The step that matters
Cool the mixture before adding the salmon and egg. If the white sauce is still hot, the beaten egg can scramble and the mixture becomes loose, so the cakes may not hold their shape when fried.
“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.

Salmon Salad155 recipes
Canned Salmon14 recipes
Smoked Salmon14 recipes
Tomato Soup526 recipes