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Welsh Rarebit

A cheese‑based topping served over toasted bread.

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

Ingredients

Directions

Prepare the bread

  1. Toast the bread until golden brown.

Make the cheese sauce

  1. In a saucepan, melt the butter and stir in the flour.

  2. Gradually add the milk, stirring until thickened.

  3. Remove from heat and mix in the cheese, mustard, and egg yolk.

Broil and serve

  1. Spread the cheese mixture over the toasted bread.

  2. Place under a broiler until bubbly and golden.

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. Bread + buttertop 7% of all pairs
    Smell alikemoderate
    Cooked together27,232 recipes

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

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

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

  3. Bread + cheesetop 7% of all pairs
    Smell alikemoderate
    Cooked together2,130 recipes

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

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

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

  5. Cheese + milktop 10% of all pairs
    Smell alikemoderate
    Cooked 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

Cheese
Melts into the sauce and browns under the broiler, giving the rarebit its savory flavor and golden top.
Flour
Thickens the butter and milk into a smooth sauce that holds the cheese.
Butter
Adds fat and richness and forms the base of the roux with the flour.
Milk
Liquid that the flour thickens into a creamy sauce.
Egg yolk
Adds richness and helps enrich and set the sauce.
Mustard
Adds sharp, tangy flavor that balances the richness of the cheese.

The step that matters

Remove from heat before mixing in the cheese, mustard, and egg yolk. Cheese and egg yolk can turn grainy or scrambled if they meet a very hot sauce. Taking the pan off the heat first lets them blend smoothly into the sauce.

Swap the mustard

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

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

Fit is the average pairing score against bread, cheese, butter, flour, milk, 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.

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