Why it works: Clam and crab share more aroma than cooks usually use. They rank in the top 8% of all ingredient pairs, and cooks put them together in 17 recipes. Both carry 2,3,5-trimethylpyrazine, which smells cocoa, roasted. The science ↓
Fish Stock
Ingredients
Directions
Place a saucepan over medium heat and add the butter and sliced onion.
Add the sliced tomatoes and various kinds of fish.
Cook until the onions are well browned.
Add the sweet herbs, salt, pepper, and enough water to make the desired amount of stock.
Cook for 30 minutes, then pound the mixture with a wooden pestle.
Strain the stock and cook again until it jellies.
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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Clam + crabtop 8% of all pairsSmell alikestrongCooked together17 recipes
Shared aroma: 2,3,5-trimethylpyrazine (cocoa, roasted).
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Onion + tomatotop 8% of all pairsSmell alikemoderateCooked together20,633 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Fish + oystertop 9% of all pairsSmell alikemoderateCooked together496 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Butter + crabtop 10% of all pairsSmell alikemoderateCooked together812 recipes
Shared aroma: nonanal (fat, citrus).
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Oyster + crabtop 11% of all pairsSmell alikemoderateCooked together95 recipes
Shared aroma: 1-octen-3-ol (mushroom, earthy).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Fish
- Gives the stock its main savoury, briny flavour and body as it breaks down.
- Onion
- Browning the onion adds sweetness and deeper colour to the stock.
- Tomatoes
- Add acidity and a fruity note that balances the richness of the fish.
- Butter
- Carries flavour from the onion and fish and adds richness to the stock.
The step that matters
Cook the onions until well browned. Browning builds deeper, sweeter flavour through caramelisation and Maillard reactions. Pale onions leave the stock tasting flat, while over-darkened onions turn it bitter.
Swap the tomato
How well each one fits the dish's main ingredients (butter, onion, fish, oyster, clam, smelt, crab):
- Potatofits better
- Horseradishfits better
- Capsicumfits about as well
- Tomatothe original
Fit is the average pairing score against butter, onion, fish, oyster, clam, smelt, crab. 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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