Why it works: Bread and cheese are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 2,130 recipes. Both carry delta-decalactone, which smells sweet, creamy. The science ↓
Welsh Rare-bit
Ingredients
Directions
Prepare
Cut the bread into even slices.
Toast the slices.
Heat the milk in a saucepan for thickening.
Beat the egg in a bowl.
Make the cheese sauce
Mix in the cheese and salt.
Stir in the egg mixture and flour.
Continue stirring until the cheese melts.
Serve
Pour the cheese mixture over the toast.
Serve.
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 + cheesetop 7% of all pairsSmell alikemoderateCooked together2,130 recipes
Shared aroma: delta-decalactone (sweet, creamy).
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Cheese + milktop 10% of all pairsSmell alikemoderateCooked together4,426 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
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Bread + milktop 11% of all pairsSmell alikemoderateCooked together11,466 recipes
Shared aroma: 2-undecenal (sweet).
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Bread + eggtop 13% of all pairsSmell alikemoderateCooked together22,662 recipes
Shared aroma: (e)-2-octenal (fatty, green).
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Milk + flourtop 14% of all pairsSmell alikelowCooked together78,219 recipes
Shared aroma: isobutyraldehyde (malty, green).
Milk and flour barely smell alike, yet cooks put them together in 78,219 recipes: they work on texture and structure more than aroma.
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Cheese
- Melts into the sauce, providing rich flavour and a creamy, savoury body.
- Egg
- Binds the sauce and adds richness as it thickens with heat.
- Flour
- Thickens the milk and cheese mixture to give the sauce body.
- Milk
- Forms the liquid base of the sauce that the cheese melts into.
The step that matters
Continue stirring until the cheese melts. Stirring keeps the cheese evenly distributed and prevents the sauce from scorching or turning grainy. Gentle, steady heat helps the cheese melt smoothly into the thickened base.
“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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