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 ↓
Welsh Rarebit
Ingredients
Directions
The book says “a warm oven”. The 400°F (200°C) in the steps is the modern equivalent, not the book's own figure.
Prepare
Grate the cheese and mix with cayenne pepper.
Fry the bread slices in butter on one side until golden.
Top and bake
Spread a thick layer of cheese on the fried side of the bread.
Place the slices in a baking pan and bake in a warm oven at 400°F (200°C) until the cheese begins to melt.
Serve
Serve warm.
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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Gruyere cheese + buttertop 9% of all pairsSmell alikemoderateCooked together323 recipes
Shared aroma: gamma-decalactone (peach, creamy).
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Gruyere cheese + breadtop 15% of all pairsSmell alikemoderateCooked together38 recipes
Shared aroma: ethyl caproate (fruity, apple peel).
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Pepper + breadtop 16% of all pairsSmell alikemoderateCooked together20,964 recipes
Shared aroma: 2-nonenal (fatty, green).
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Pepper + buttertop 21% of all pairsSmell alikemoderateCooked together85,593 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Cheese
- Melts into a rich, stretchy topping that sets into a savoury layer when cooled.
- Welsh bread
- Forms the sturdy base that holds the cheese topping while it bakes.
- Butter
- Fries the bread to a golden, browned surface and adds richness.
The step that matters
Baking until the cheese just begins to melt. Cheese turns greasy and separates if overheated for too long, while underheated cheese stays stiff. Pulling the slices once the cheese softens keeps the topping smooth and the bread from drying out.
“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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