Why it works: Butter and milk are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 81,283 recipes. Both carry (z)-4-heptenal, which smells biscuit, cream. The science ↓
Welsh Rabbit or Rarebit
Ingredients
Directions
Prepare
Cut the cheese into small pieces.
Prepare squares of hot, well-buttered toast.
Make the cheese sauce
In a saucepan, combine cheese, butter, milk or ale, mustard, and pepper.
Stir the mixture over low heat until it resembles thick cream.
Serve
Pour the cheese 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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Butter + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
-
Cheddar cheese + buttertop 8% of all pairsSmell alikemoderateCooked together2,436 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).
-
Cheddar cheese + milktop 11% of all pairsSmell alikemoderateCooked together1,964 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
-
Cheddar cheese + mustardtop 11% of all pairsSmell alikemoderateCooked together708 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, giving the rarebit its rich, savoury body.
- Butter
- Adds fat that makes the cheese sauce smooth and glossy as it melts.
- Milk or ale
- Provides liquid that loosens the melted cheese into a pourable sauce.
- Mustard
- Adds sharpness that balances the richness of the cheese.
The step that matters
Stir the mixture over low heat. High heat can make cheese seize, turn grainy or oily, or scorch on the pan base. Gentle heat lets the cheese melt evenly into a smooth sauce.
Swap the mustard
How well each one fits the dish's main ingredients (cheddar cheese, butter, milk, pepper):
- Potatofits better
- Capsicumfits better
- Tomatofits better
- Mustardthe original
Fit is the average pairing score against cheddar cheese, butter, milk, 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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