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Fish on Toast

A creamy fish sauce served over toast, topped with hard‑cooked eggs.

From an old cookbook · modernised transcription
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Why it works: Milk and butter are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 81,283 recipes. Both carry (z)-4-heptenal, which smells biscuit, cream. The science ↓

Fish on Toast

Ingredients

Directions

Make the sauce

  1. Melt the butter in a saucepan.

  2. Add flour and seasoning, then gradually stir in the milk.

  3. Beat well and cook for 3 minutes.

  4. Add the fish and cook for 2 more minutes.

  5. Remove from heat and stir in the beaten egg.

Serve

  1. Pour the mixture over the toast.

  2. Garnish with hard-cooked eggs before serving.

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. Milk + buttertop 7% of all pairs
    Smell alikemoderate
    Cooked together81,283 recipes

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

  2. Fish + buttertop 12% of all pairs
    Smell alikemoderate
    Cooked together4,488 recipes

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

  3. Butter + flourtop 12% of all pairs
    Smell alikelow
    Cooked together124,287 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  4. Milk + fishtop 13% of all pairs
    Smell alikemoderate
    Cooked together1,432 recipes

    Shared aroma: 4-heptenal (creamy, biscuit).

  5. Milk + flourtop 14% of all pairs
    Smell alikelow
    Cooked together78,219 recipes

    Shared aroma: isobutyraldehyde (malty, green).

Butter and flour 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

Butter
Enriches the sauce and carries flavour as the base of the roux.
Flour
Thickens the milk into a smooth, coating sauce with the butter.
Milk
Forms the liquid body of the sauce that the flour thickens.
Egg
Stirred in off the heat to enrich and slightly thicken the sauce.
Cold cooked fish
Provides the main flavour and texture of the creamy topping.

The step that matters

Stirring in the beaten egg off the heat. If the sauce is too hot when the egg goes in, the egg proteins can scramble into lumps instead of thickening the sauce smoothly. Removing the pan from the heat first lets the egg blend in gently.

“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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