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 ↓
Cheese Sandwiches
Ingredients
Directions
Mash the yolk of the egg in a bowl.
Add melted butter and mix until smooth.
Stir in salt, sugar, pepper, mustard, and cheese, mixing well.
Add vinegar to achieve the desired thickness.
Spread the mixture on buttered slices of white bread.
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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Cheese + breadtop 7% of all pairsSmell alikemoderateCooked together2,130 recipes
Shared aroma: delta-decalactone (sweet, creamy).
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Mustard + vinegartop 7% of all pairsSmell alikemoderateCooked together14,067 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Cheese + buttertop 8% of all pairsSmell alikemoderateCooked together7,962 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
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Pepper + mustardtop 9% of all pairsSmell alikemoderateCooked together15,430 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Egg yolk
- Adds richness and body, helping the filling hold together as a spread.
- Grated cheese
- Provides the main flavour and makes the filling thick and savoury.
- Melted butter
- Adds fat that makes the filling smooth and spreadable.
- Vinegar
- Adds acidity that sharpens the flavour and loosens the thickness.
The step that matters
Add vinegar to achieve the desired thickness. Vinegar is added a little at a time because too much thins the mixture past the point of spreading well. Adding it gradually lets the cook stop once the texture is right.
Swap the mustard
How well each one fits the dish's main ingredients (egg, cheese, pepper, sugar, butter, vinegar, bread):
- Capsicumfits about as well
- Mustardthe original
- Asparagusfits less well
- Tomatofits less well
Fit is the average pairing score against egg, cheese, pepper, sugar, butter, vinegar, 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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