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 Rare-bit, American Style
Ingredients
Directions
Make the sauce
In a saucepan, combine the chopped cheese, port or sherry, mustard, Worcestershire sauce, cayenne pepper, and butter.
Place the saucepan over medium heat and stir until the cheese is melted.
Add the beaten egg and continue stirring until the egg is set.
Serve
Pour the mixture over hot buttered 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.
-
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).
-
Cheese + mustardtop 11% of all pairsSmell alikemoderateCooked together1,805 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Mustard + saucetop 13% of all pairsSmell alikemoderateCooked together2,120 recipes
Shared aroma: ethanol (alcoholic, ethereal).
-
Cheese + sherrytop 14% of all pairsSmell alikemoderateCooked together143 recipes
Shared aroma: ethyl pentanoate (yeast, fruit).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- American cheese
- Melts into a smooth, rich sauce that forms the body of the rarebit.
- Egg
- Sets when heated, thickening the cheese mixture so it clings to the toast.
- Old port or brown sherry
- Adds sweetness and depth of flavor while thinning the melted cheese.
The step that matters
Stirring in the egg. Egg proteins set at moderate heat and can scramble if the mixture is too hot or left unstirred. Keep the heat moderate and stir constantly so the egg thickens the sauce smoothly.
Swap the mustard
How well each one fits the dish's main ingredients (cheese, sherry, sauce, pepper, butter, egg):
- Capsicumfits better
- Mustardthe original
- Asparagusfits about as well
- Tomatofits about as well
Fit is the average pairing score against cheese, sherry, sauce, pepper, butter, egg. 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.
More welsh rarebit recipes
You might also like
The free Flavor Lab newsletter: one surprising pairing a week and the molecular reason it works, in 60 seconds. No spam, unsubscribe anytime.
Prefer an account? Create a free account to save pairings and unlock the full chemistry.
Macaroni and Cheese102 recipes
Cheese Making50 recipes
Cheese Fritters34 recipes
Cheese Omelette31 recipes