Why it works: Cream and butter are a kitchen classic. They rank in the top 8% of all ingredient pairs, and cooks put them together in 41,516 recipes. Both carry delta-dodecalactone, which smells sweet, creamy. The science ↓
Welsh Rarebit
Ingredients
Directions
Make the sauce
In a double boiler, combine the cheese and cream or milk.
Mix the mustard, salt, and cayenne, then add the beaten egg.
Once the cheese is melted, stir in the mustard mixture and butter.
Cook until thickened, stirring constantly.
Serve
Pour the mixture over the toast and serve immediately.
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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Cream + buttertop 8% of all pairsSmell alikemoderateCooked together41,516 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
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Cheese + buttertop 8% of all pairsSmell alikemoderateCooked together7,962 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
-
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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Cheese + creamtop 15% of all pairsSmell alikemoderateCooked together2,655 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
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 to provide the main flavour and rich, creamy body.
- Egg
- Thickens the sauce as it heats, giving it a smooth, spoonable texture.
- Cream or milk
- Adds moisture and helps the cheese melt into a smooth, pourable sauce.
- Mustard
- Adds sharpness that balances the richness of the cheese and egg.
The step that matters
Cook until thickened, stirring constantly. Egg proteins set when heated, so the sauce can curdle or scramble if it gets too hot or is left unstirred. Gentle, constant stirring over a double boiler keeps it smooth.
Swap the mustard
How well each one fits the dish's main ingredients (cheese, cream, pepper, egg, butter):
- Potatofits better
- Capsicumfits about as well
- Asparagusfits about as well
- Mustardthe original
Fit is the average pairing score against cheese, cream, pepper, egg, butter. 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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