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Sardine Sandwiches

A sandwich made with sardines, hard‑boiled eggs, mustard, horseradish, and buttered bread or biscuits.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 ingredients
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Why it works: Mustard and horseradish match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 1,832 recipes. Both carry coumarin, which smells sweet, hay. The science ↓

Sardine Sandwiches

Ingredients

Directions

  1. Remove bones and skin from sardines and chop finely.

  2. Chop hard-boiled eggs and mix with sardines, mustard, and horseradish.

  3. Spread the mixture between thin slices of buttered bread or cold biscuits.

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. Mustard + horseradishtop 1% of all pairs
    Smell alikestrong
    Cooked together1,832 recipes

    Shared aroma: coumarin (sweet, hay).

  2. Egg + breadtop 13% of all pairs
    Smell alikemoderate
    Cooked together22,662 recipes

    Shared aroma: (e)-2-octenal (fatty, green).

  3. Mustard + breadtop 16% of all pairs
    Smell alikemoderate
    Cooked together1,484 recipes

    Shared aroma: 2-acetyl-1-pyrroline (popcorn, roasted).

  4. Horseradish + breadtop 19% of all pairs
    Smell alikemoderate
    Cooked together240 recipes

    Shared aroma: coumarin (sweet, hay).

  5. Egg + horseradishtop 26% of all pairs
    Smell alikelow
    Cooked together694 recipes

    Shared aroma: 2-methylbutyraldehyde (malty, chocolate).

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

What each ingredient does

Sardines
Provide the main body and rich, savoury flavour of the filling.
Hard-boiled eggs
Add creamy body and mild richness that softens the fish texture.
French mustard
Adds sharp, pungent flavour that cuts through the richness of the fish and eggs.
Grated horseradish
Adds sharp, pungent heat that brightens the flavour of the filling.

Swap the horseradish

How well each one fits the dish's main ingredients (egg, mustard, bread):

  1. Horseradishthe original
  2. Shallotfits about as well
  3. Lettucefits less well
  4. Chivefits less well

Fit is the average pairing score against egg, mustard, 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.

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