Why it works: Pepper and parsley match in chemistry and in kitchens. They rank in the top 2% of all ingredient pairs, and cooks put them together in 34,122 recipes. Both carry 4'-methylacetophenone, which smells bitter almond. The science ↓
Fish Croquettes
Ingredients
Directions
Prepare
Mix the fish with the mashed potatoes.
Add the butter to the hot potatoes to melt.
Incorporate the remaining ingredients thoroughly and set aside to cool.
Shape and coat
Once cool, shape the mixture into balls.
Dip each ball into the beaten egg, then roll in cracker crumbs or fine bread crumbs.
Fry and serve
Just before serving, heat the frying fat and plunge the croquettes in for 2 minutes.
Drain well and serve immediately.
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 + parsleytop 2% of all pairsSmell alikestrongCooked together34,122 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Potato + parsleytop 5% of all pairsSmell alikemoderateCooked together2,855 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Butter + breadtop 7% of all pairsSmell alikemoderateCooked together27,232 recipes
Shared aroma: delta-decalactone (sweet, creamy).
-
Butter + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
-
Potato + peppertop 9% of all pairsSmell alikemoderateCooked together8,305 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Potatoes
- Form the bulk of the mixture and give the croquettes a soft, tender interior.
- Fish
- Supplies the main flavour and the flaky texture of the filling.
- Egg
- Binds the mixture so the croquettes hold their shape when fried.
- Butter
- Adds richness and moisture to the mashed potatoes.
- Milk
- Keeps the potato mixture moist and smooth for easier shaping.
The step that matters
Let the mixture cool before shaping. A hot mixture is soft and sticky, so the balls can fall apart or stick to the hands. Cooling firms the starch and binders so the croquettes keep their shape in the hot fat.
Swap the parsley
How well each one fits the dish's main ingredients (fish, potato, butter, milk, egg, pepper, bread):
- Parsleythe original
- Nutmegfits about as well
- Thymefits less well
- Cinnamonfits less well
Fit is the average pairing score against fish, potato, butter, milk, egg, pepper, bread. 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.

Brown Bread461 recipes
Potato Croquettes255 recipes
Fried Fish120 recipes
White Bread80 recipes