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Egg Sandwiches

Hard-boiled eggs sliced and layered between buttered bread, seasoned with salt, pepper, and dry mustard.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Why it works: Bread and butter are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 27,232 recipes. Both carry delta-decalactone, which smells sweet, creamy. The science ↓

Egg Sandwiches

Ingredients

Directions

Prepare the eggs

  1. Boil the eggs for 10 minutes.

  2. Transfer the eggs to cold water, then peel and slice them.

Assemble and cut

  1. Spread butter on the slices of bread.

  2. Layer the egg slices between the buttered bread.

  3. Season with salt, pepper, and a little dry mustard.

  4. Trim the edges and cut the sandwiches.

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. Bread + buttertop 7% of all pairs
    Smell alikemoderate
    Cooked together27,232 recipes

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

  2. Pepper + mustardtop 9% of all pairs
    Smell alikemoderate
    Cooked together15,430 recipes

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

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

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

  4. Bread + mustardtop 16% of all pairs
    Smell alikemoderate
    Cooked together1,484 recipes

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

  5. Bread + peppertop 16% of all pairs
    Smell alikemoderate
    Cooked together20,964 recipes

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

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

What each ingredient does

Eggs
Provide the main filling, and their proteins set firm when boiled so the slices hold together.
Bread
Gives structure that holds the sliced egg filling in a handled sandwich.
Butter
Adds richness and a fat layer that keeps the bread from soaking up moisture from the eggs.
Dry mustard
Adds a sharp, aromatic bite that balances the mildness of the egg.

The step that matters

Boil the eggs for 10 minutes, then cool them in cold water. Boiling too long causes a grey-green ring around the yolk from a reaction between sulfur and iron in the egg. Moving the eggs to cold water stops the cooking, keeping yolks set but tender and easier to peel and slice cleanly.

Swap the mustard

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

  1. Capsicumfits better
  2. Asparagusfits better
  3. Chivefits better
  4. Mustardthe original

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