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Peanut Butter Sandwiches

A sandwich made with peanut butter, toasted bread, sliced hard‑boiled egg, lemon juice, and watercress.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 ingredients
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Why it works: Lemon and watercress match in chemistry and in kitchens. They rank in the top 3% of all ingredient pairs, and cooks put them together in 579 recipes. Both carry coumarin, which smells sweet, hay. The science ↓

Peanut Butter Sandwiches

Ingredients

Directions

  1. Spread peanut butter on thin slices of toasted bread.

  2. Add a thin slice of hard-boiled egg and a few drops of lemon juice.

  3. Squeeze the halves of the sandwich together.

  4. Garnish with watercress.

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. Lemon + watercresstop 3% of all pairs
    Smell alikestrong
    Cooked together579 recipes

    Shared aroma: coumarin (sweet, hay).

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

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

  3. Peanut + watercresstop 12% of all pairs
    Smell alikestrong
    Cooked together15 recipes

    Shared aroma: coumarin (sweet, hay).

  4. Bread + eggtop 13% of all pairs
    Smell alikemoderate
    Cooked together22,662 recipes

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

  5. Peanut + breadtop 15% of all pairs
    Smell alikemoderate
    Cooked together97 recipes

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

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

What each ingredient does

Peanut butter
Provides fat and rich, savory flavor that carries the sandwich filling.
Hard boiled egg
Adds soft, creamy protein texture that gives the sandwich body.
Lemon juice
Adds acidity that brightens the rich peanut butter and egg.

Swap the peanut

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

  1. Chestnutfits better
  2. Almondfits better
  3. Walnutfits better
  4. Peanutthe original

Fit is the average pairing score against butter, bread, egg, lemon, watercress. 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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