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 Rare-bit
Ingredients
Directions
Prepare the toast
Toast the bread slices until golden, then butter them generously.
Moisten the toast with a few teaspoons of boiling water and keep warm.
Make the cheese sauce
In a saucepan over medium heat, bring the milk or porter to a boil.
Add the grated cheese and stir constantly until fully melted.
Season with salt and cayenne pepper.
Beat the egg yolks until creamy, then quickly stir them into the cheese mixture.
Serve
Pour the cheese mixture over the hot toast and serve immediately on a warm plate.
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.
-
Bread + buttertop 7% of all pairsSmell alikemoderateCooked together27,232 recipes
Shared aroma: delta-decalactone (sweet, creamy).
-
Milk + buttertop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
-
Cheese + breadtop 7% of all pairsSmell alikemoderateCooked together2,130 recipes
Shared aroma: delta-decalactone (sweet, creamy).
-
Cheese + buttertop 8% of all pairsSmell alikemoderateCooked together7,962 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
-
Cheese + milktop 10% of all pairsSmell alikemoderateCooked together4,426 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
- Grated cheese
- Melts into the sauce to provide the main flavour and creamy body.
- Egg yolks
- Thicken the cheese sauce and add richness as they set gently with heat.
- Milk or porter
- Liquid base that melts the cheese smoothly; porter adds malty depth.
- Bread slices
- Sturdy base that holds the sauce and soaks up its flavour.
The step that matters
Stirring the egg yolks into the cheese mixture. Egg yolks can scramble if they meet very hot liquid directly. Beating them until creamy and stirring quickly into the sauce, off intense heat, helps them thicken it smoothly.
“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.
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.
Brown Bread461 recipes
Macaroni and Cheese102 recipes
White Bread80 recipes
Bread Omelette60 recipes