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 ↓
Dressing for Sandwiches
Ingredients
Directions
Prepare
In a bowl, combine sweet oil, mixed mustard, butter, red pepper, salt, and egg yolk. Beat until smooth and keep cool.
Finely chop the tongue, ham, and cold chicken if using.
Assemble
Spread the dressing on sliced bread, then add the chopped meat.
Press the slices together and trim the edges.
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.
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Butter + breadtop 7% of all pairsSmell alikemoderateCooked together27,232 recipes
Shared aroma: delta-decalactone (sweet, creamy).
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Ham + breadtop 7% of all pairsSmell alikemoderateCooked together2,536 recipes
Shared aroma: 2-acetyl-1-pyrroline (popcorn, roasted).
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Mustard + peppertop 9% of all pairsSmell alikemoderateCooked together15,430 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Mustard + chickentop 13% of all pairsSmell alikemoderateCooked together2,192 recipes
Shared aroma: gamma-nonanolactone (coconut, creamy).
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Egg + breadtop 13% of all pairsSmell alikemoderateCooked together22,662 recipes
Shared aroma: (e)-2-octenal (fatty, green).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Egg yolk
- Helps emulsify the oil, mustard and butter into a smooth, stable dressing.
- Butter
- Adds richness and body to the dressing.
- Mixed mustard
- Adds sharp flavour that cuts through the richness of the butter and meat.
- Sweet oil
- Carries flavour and keeps the dressing smooth and spreadable.
The step that matters
Beat the dressing until smooth. The egg yolk, oil, mustard and butter only combine into a smooth, stable emulsion if they are beaten together thoroughly. Keeping it cool helps the butter stay firm and the emulsion hold, so the dressing spreads evenly without separating.
Swap the mustard
How well each one fits the dish's main ingredients (butter, pepper, egg, ham, chicken, bread):
- Capsicumfits better
- Asparagusfits better
- Potatofits about as well
- Mustardthe original
Fit is the average pairing score against butter, pepper, egg, ham, chicken, 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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