Why it works: Parsley and pepper 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 ↓
Baked Mackerel or Herring
Ingredients
Directions
Prepare the fish
Wash the mackerel or herrings in cold water and dry them with a cloth.
Cut off the heads and carefully split open each fish to remove the backbone.
Lay one fish open flat in a baking dish, skin side down.
Make the herb filling
Wash and dry a sprig of parsley, then chop it finely.
Chop half an onion, a sprig of thyme, and marjoram finely.
Grate a few bread crumbs until you have about 2 teaspoons.
Mix the onion, herbs, and bread crumbs together.
Assemble and bake
Sprinkle pepper and coarse sea salt over the fish in the baking dish.
Spread the herb and bread crumb mixture over the fish.
Place the other fish on top, skin side up.
Melt 2 oz. of clarified dripping in a saucepan.
Pour the melted dripping over the fish in the baking dish.
Cover the dish and bake.
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.
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Parsley + peppertop 2% of all pairsSmell alikestrongCooked together34,122 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Onion + parsleytop 9% of all pairsSmell alikemoderateCooked together25,843 recipes
Shared aroma: 2,4-decadienal (seaweed).
-
Onion + peppertop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Parsley + breadtop 15% of all pairsSmell alikemoderateCooked together8,588 recipes
Shared aroma: 2,4-decadienal (seaweed).
-
Onion + breadtop 15% of all pairsSmell alikemoderateCooked together8,676 recipes
Shared aroma: 2,4-decadienal (seaweed).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Mackerel or herrings
- Forms the main body of the dish, cooking into moist, flaky fillets when baked.
- Clarified dripping
- Adds fat that keeps the fish moist and carries flavour as it bakes.
- Bread crumbs
- Absorb fat and juices, adding light texture to the herb layer.
Swap the onion
How well each one fits the dish's main ingredients (parsley, bread, pepper):
- Carrotfits better
- Capsicumfits better
- Shallotfits better
- Onionthe original
Fit is the average pairing score against parsley, bread, pepper. 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.
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