Why it works: Cheese and butter are a kitchen classic. They rank in the top 8% of all ingredient pairs, and cooks put them together in 7,962 recipes. Both carry delta-dodecalactone, which smells sweet, creamy. The science ↓
Welsh Rarebit
Ingredients
Directions
Make the sauce
In a saucepan, combine the grated cheese, butter, ale (or egg yolks and milk), salt, mustard, pepper, and cayenne.
Stir over medium heat until the mixture is melted and smooth.
Serve
Pour the cheese mixture over the toast on a hot dish.
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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Cheese + buttertop 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).
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Butter + eggtop 17% of all pairsSmell alikemoderateCooked together118,967 recipes
Shared aroma: decanal (soap, orange peel).
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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
- Factory cheese
- Melts into the sauce and provides the main rich, savory flavor.
- Butter
- Adds fat that makes the sauce smooth and rich.
- Ale
- Thins the cheese mixture and adds a malty aroma.
- Egg yolks
- Thicken the sauce and give it a creamy texture.
The step that matters
Stir over medium heat until melted and smooth. Cheese proteins toughen and turn grainy or stringy if overheated, and egg yolks can scramble. Gentle, steady heat and constant stirring keep the sauce smooth and creamy.
Swap the mustard
How well each one fits the dish's main ingredients (cheese, butter, egg, pepper):
- Capsicumfits better
- Asparagusfits about as well
- Potatofits about as well
- Mustardthe original
Fit is the average pairing score against cheese, butter, egg, pepper. 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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