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Welsh Rarebit

A cheese-based sauce served hot over buttered toast.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 8 ingredients
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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 Rarebit

Ingredients

Directions

Make the cheese sauce

  1. Melt the butter in a saucepan.

  2. Add the cheese cut into small pieces and then the milk or cream.

  3. Stir often until the cheese is melted.

  4. Add the beaten egg and season with pepper, salt, and mustard.

Serve

  1. Pour the mixture over slices of buttered toast in a hot dish.

  2. Serve hot.

Recipe from a historical cookbook (Internet Archive).

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.

  1. Butter + milktop 7% of all pairs
    Smell alikemoderate
    Cooked together81,283 recipes

    Shared aroma: (z)-4-heptenal (biscuit, cream).

  2. Cheese + buttertop 8% of all pairs
    Smell alikemoderate
    Cooked together7,962 recipes

    Shared aroma: delta-dodecalactone (sweet, creamy).

  3. Pepper + mustardtop 9% of all pairs
    Smell alikemoderate
    Cooked together15,430 recipes

    Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).

  4. Cheese + milktop 10% of all pairs
    Smell alikemoderate
    Cooked together4,426 recipes

    Shared aroma: delta-dodecalactone (sweet, creamy).

  5. Cheese + mustardtop 11% of all pairs
    Smell alikemoderate
    Cooked together1,805 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 to provide the main flavour and creamy body.
Egg
Thickens the cheese mixture as it gently cooks, giving it a richer set.
Butter
Adds fat and richness to the sauce and helps the cheese melt smoothly.
Milk or cream
Loosens the cheese so it forms a smooth, pourable sauce.

The step that matters

Stir the cheese until melted. Cheese is likely to turn stringy or grainy if it gets too hot or is left unstirred. Stirring often over gentle heat keeps the sauce smooth. Adding the beaten egg to a very hot mixture can also scramble it.

Swap the mustard

How well each one fits the dish's main ingredients (cheese, butter, milk, egg, pepper):

  1. Potatofits better
  2. Capsicumfits better
  3. Asparagusfits better
  4. Mustardthe original

Fit is the average pairing score against cheese, butter, milk, 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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