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Sardine Sandwiches

A sandwich made by pounding sardines with butter, salt, and cayenne, spread on brown bread, topped with tomato, salt, pepper, sugar, and optional lemon.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 10 ingredients
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Why it works: Pepper and lemon match in chemistry and in kitchens. They rank in the top 3% of all ingredient pairs, and cooks put them together in 27,047 recipes. Both carry trans-2-nonenal, which smells cardboard, fatty. The science ↓

Sardine Sandwiches

Ingredients

Directions

Prepare the filling

  1. Pound the sardines with the butter, salt, and cayenne until smooth.

  2. Spread the mixture on slices of brown bread.

Assemble and serve

  1. Top with a slice of skinned tomato.

  2. Sprinkle with salt, pepper, and a pinch of sugar.

  3. Add a few drops of lemon juice if desired.

  4. Form into sandwiches and cut into finger lengths.

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. Pepper + lemontop 3% of all pairs
    Smell alikestrong
    Cooked together27,047 recipes

    Shared aroma: trans-2-nonenal (cardboard, fatty).

  2. Butter + breadtop 7% of all pairs
    Smell alikemoderate
    Cooked together27,232 recipes

    Shared aroma: delta-decalactone (sweet, creamy).

  3. Pepper + tomatotop 7% of all pairs
    Smell alikemoderate
    Cooked together17,923 recipes

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

  4. Bread + tomatotop 10% of all pairs
    Smell alikemoderate
    Cooked together1,013 recipes

    Shared aroma: 2-nonenal (fatty, green).

  5. Tomato + lemontop 11% of all pairs
    Smell alikemoderate
    Cooked together4,592 recipes

    Shared aroma: 3-hexenal (apple, fruity).

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

What each ingredient does

Sardines
Provide the main fish flavour and a smooth, spreadable base for the filling.
Butter
Adds fat and richness, helping the sardine paste become smooth and spreadable.
Brown bread
Forms the structure of the sandwich and holds the filling in place.
Tomato
Adds moisture and a mild acidity that balances the rich fish and butter.

Swap the lemon

The recipe marks lemon as optional. How well each one fits the dish's main ingredients (butter, pepper, bread, tomato, sugar):

  1. Lemonthe original
  2. Cherryfits about as well
  3. Plumfits about as well
  4. Figfits about as well

Fit is the average pairing score against butter, pepper, bread, tomato, sugar. 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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