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 ↓
Cheese, Toasted, or Welsh Rare-bit
Ingredients
Directions
Cut the bread into slices about ½ inch thick and remove the crust.
Toast the bread slightly without hardening or burning it, then spread with butter.
Cut cheese into slices slightly smaller than the bread and place on the toasted bread.
Melt the cheese in a cheese toaster, ensuring it does not burn.
Spread a little mustard and season with pepper on top of the melted cheese.
Serve immediately on hot plates with additional toast, mustard, pepper, and salt.
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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Bread + buttertop 7% of all pairsSmell alikemoderateCooked together27,232 recipes
Shared aroma: delta-decalactone (sweet, creamy).
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Bread + cheesetop 7% of all pairsSmell alikemoderateCooked together2,130 recipes
Shared aroma: delta-decalactone (sweet, creamy).
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Butter + cheesetop 8% of all pairsSmell alikemoderateCooked together7,962 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
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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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Cheese + mustardtop 11% of all pairsSmell alikemoderateCooked together1,805 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
Swap the mustard
How well each one fits the dish's main ingredients (bread, butter, cheese, pepper):
- Capsicumfits better
- Tomatofits better
- Potatofits about as well
- Mustardthe original
Fit is the average pairing score against bread, butter, cheese, pepper. Candidates are from the same food group and used in at least 100 recipes.
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