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Royal Ham Sandwiches

A sandwich made with boiled ham, egg yolks, butter, mustard, and bread.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 ingredients
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Why it works: Butter and bread 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 ↓

Royal Ham Sandwiches

Ingredients

Directions

Prepare the filling

  1. Chop the boiled ham and egg yolks to the desired quantity.

  2. Press the mixture through a colander.

  3. Cream the butter and mix it with the ham and egg yolks.

  4. Add the mustard for extra flavor.

Assemble

  1. Spread the mixture between thin slices of bread and cut or fold as desired.

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

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

  2. Ham + breadtop 7% of all pairs
    Smell alikemoderate
    Cooked together2,536 recipes

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

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

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

  4. Ham + mustardtop 14% of all pairs
    Smell alikelow
    Cooked together747 recipes

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

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

Egg yolks
Their rich, creamy texture binds the filling and adds moisture and body.
Butter
Adds fat and richness, helping the filling spread smoothly and taste rounded.
Boiled ham
Provides the savoury, meaty flavour that forms the body of the filling.
Prepared mustard
Adds sharpness and aroma that cut through the richness of the butter and yolks.

Swap the mustard

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

  1. Asparagusfits better
  2. Leekfits better
  3. Shallotfits about as well
  4. Mustardthe original

Fit is the average pairing score against ham, egg, butter, 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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