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 ↓
Welsh Rarebit
Ingredients
Directions
The book says “a very hot oven”. The 400°F (200°C) in the steps is the modern equivalent, not the book's own figure.
Make the cheese topping
Cut thin slices of cheese and place them in a saucepan with a little butter.
Melt the cheese and butter over low heat.
Top and bake
Pour the melted mixture over hot, well-buttered toast and dust with pepper.
Place in a 400°F (200°C) oven for a few minutes and 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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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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Cheese + buttertop 8% of all pairsSmell alikemoderateCooked together7,962 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
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Bread + peppertop 16% of all pairsSmell alikemoderateCooked together20,964 recipes
Shared aroma: 2-nonenal (fatty, green).
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Cheese + peppertop 18% of all pairsSmell alikemoderateCooked together7,861 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
- Cheese
- Melts into the sauce that forms the rarebit's rich, savoury topping.
- Butter
- Adds fat that makes the melted cheese smooth and richer in texture.
- Bread
- Provides the sturdy base that holds the hot cheese topping.
The step that matters
Melt the cheese over low heat. High heat toughens the cheese proteins and separates its fat, leaving the sauce grainy or oily. Gentle heat keeps it smooth and cohesive.
“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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