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Fish Stock

A savory liquid made by simmering small fish, onions, tomatoes, herbs, and seasonings in butter and water.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 8 ingredients
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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

Make the stock

  1. Melt the butter in a saucepan over medium heat, then add the sliced onion and tomatoes.

  2. Include assorted small fish and cook until the onions are browned.

  3. Add sweet herbs, salt, pepper, and enough water to make the desired amount of stock, then cook for 30 minutes.

  4. Pound the mixture with a wooden pestle.

Finish

  1. Strain and cook again until it jellies.

Recipe from a historical cookbook (Internet Archive).

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.

  1. Clam + crabtop 8% of all pairs
    Smell alikestrong
    Cooked together17 recipes

    Shared aroma: 2,3,5-trimethylpyrazine (cocoa, roasted).

  2. Onion + tomatotop 8% of all pairs
    Smell alikemoderate
    Cooked together20,633 recipes

    Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).

  3. Fish + oystertop 9% of all pairs
    Smell alikemoderate
    Cooked together496 recipes

    Shared aroma: (z)-4-heptenal (biscuit, cream).

  4. Butter + crabtop 10% of all pairs
    Smell alikemoderate
    Cooked together812 recipes

    Shared aroma: nonanal (fat, citrus).

  5. Oyster + crabtop 11% of all pairs
    Smell alikemoderate
    Cooked 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

Assorted small fish
Release savory flavor and natural gelatin into the stock as they cook down.
Onion
Browning builds sweetness and savory depth in the base of the stock.
Tomatoes
Add acidity and moisture that balance the richness of the fish.
Butter
Carries flavor and adds richness at the start of the cooking.

The step that matters

Cook again until it jellies. Fish stock sets only when enough gelatin has been concentrated by reduction. Stopping too early leaves a thin liquid, while over-reducing can make it overly salty and bitter.

Swap the tomato

How well each one fits the dish's main ingredients (butter, onion, fish, oyster, clam, smelt, crab):

  1. Potatofits better
  2. Horseradishfits better
  3. Capsicumfits about as well
  4. 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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