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Welsh Rarebit

A savoury dish of melted cheese seasoned with mustard and salt, poured over toasted crackers.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Why it works: Cream and butter are a kitchen classic. They rank in the top 8% of all ingredient pairs, and cooks put them together in 41,516 recipes. Both carry delta-dodecalactone, which smells sweet, creamy. The science ↓

Welsh Rarebit

Ingredients

Directions

Make the sauce

  1. Grate the cheese and place it in a chafing dish.

  2. Stir constantly until melted.

  3. Add the slightly warmed cream or milk and stir until smooth.

  4. Mix the mustard, salt, pepper, and beaten egg, then add to the cheese mixture.

Serve

  1. When it thickens, pour it over toasted crackers.

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. Cream + buttertop 8% of all pairs
    Smell alikemoderate
    Cooked together41,516 recipes

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

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

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

  3. Cheese + mustardtop 11% of all pairs
    Smell alikemoderate
    Cooked together1,805 recipes

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

  4. Cheese + creamtop 15% of all pairs
    Smell alikemoderate
    Cooked together2,655 recipes

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

  5. Mustard + buttertop 22% of all pairs
    Smell alikemoderate
    Cooked together8,003 recipes

    Shared aroma: guaiacol (smoky, sweet).

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

What each ingredient does

Cheese
Forms the body of the sauce and melts into a creamy base.
Cream or milk
Adds moisture so the cheese melts into a smooth sauce.
Mustard
Adds sharp flavor that balances the rich cheese.
Butter
Adds fat for richness and a smoother texture.
Fresh crackers
Provide a toasted base that holds the sauce.

The step that matters

Stir constantly until the cheese melts. Cheese heated unevenly or too fast can turn grainy or seize, because its proteins and fats separate under high heat. Constant stirring keeps the heat even so the sauce stays smooth.

Swap the mustard

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

  1. Potatofits better
  2. Onionfits better
  3. Mustardthe original
  4. Asparagusfits about as well

Fit is the average pairing score against cheese, cream, butter. 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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