Why it works: Pepper and celery match in chemistry and in kitchens. They rank in the top 5% of all ingredient pairs, and cooks put them together in 16,012 recipes. Both carry 4'-methylacetophenone, which smells bitter almond. The science ↓
Scalloped Fish
Ingredients
Directions
Cook the fish
Boil the fish in salted water until cooked.
Drain and remove all bones and skin.
Flake the fish into small pieces.
Make the white sauce
Heat the milk in a saucepan.
Dissolve the flour in a little cold milk.
Add it to the hot milk and cook until thickened.
Season the sauce with salt, pepper, celery salt, and butter.
If using, chop the green celery and add it to the sauce.
Assemble and bake
Butter a baking dish.
Layer the white sauce and fish alternately until the dish is filled.
Top with rolled cracker crumbs. Add bits of butter.
Bake until browned.
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.
-
Pepper + celerytop 5% of all pairsSmell alikestrongCooked together16,012 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Milk + buttertop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
-
Fish + buttertop 12% of all pairsSmell alikemoderateCooked together4,488 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
-
Flour + buttertop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Fish + milktop 13% of all pairsSmell alikemoderateCooked together1,432 recipes
Shared aroma: 4-heptenal (creamy, biscuit).
Flour and butter 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
- Cod or white fish
- Provides the flaky protein that forms the body of the dish.
- Milk
- Forms the white sauce that binds the fish and keeps the dish moist.
- Flour
- Thickens the milk into a smooth sauce that holds the layers together.
- Butter
- Adds richness and flavor to the sauce and helps the topping brown.
The step that matters
Thickening the white sauce. Flour must be dissolved in cold milk before it meets the hot milk, otherwise it clumps. Cooking it until thickened fully gelatinizes the starch, giving a smooth sauce that holds the layers together instead of running out when baked.
Swap the celery
The recipe marks celery as optional. How well each one fits the dish's main ingredients (fish, milk, flour, pepper, butter):
- Nutmegfits better
- Parsleyfits better
- Cinnamonfits better
- Celerythe original
Fit is the average pairing score against fish, milk, flour, pepper, butter. 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.

Fried Fish120 recipes
Cream of Celery Soup113 recipes
Fish Croquettes81 recipes
Broiled Fish68 recipes