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Welsh Rarebit

A cheese-based toast topped with melted cheese, eggs, mustard, cayenne, butter, salt, and cream.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 7 ingredients
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Why it works: Butter and cream 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. Break the cheese into small pieces.

  2. Combine the cheese and other ingredients in a bright saucepan over boiling water.

  3. Stir until the cheese melts.

Serve

  1. Spread the mixture on slices of crisp toast.

  2. Serve immediately.

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

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

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

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

  5. Cheese + creamtop 15% of all pairs
    Smell alikemoderate
    Cooked together2,655 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 provides the main rich, savoury body.
Eggs
Thicken the sauce as they gently set, adding richness and body.
Cream
Adds moisture and makes the sauce smoother and easier to spread.
Butter
Adds fat that gives the sauce a silky, rounded mouthfeel.
Mustard
Adds a sharp, tangy flavour that balances the richness of the cheese.

The step that matters

Keep the heat gentle while stirring. Eggs thicken the sauce only when heated slowly. If the heat is too high, they scramble, and the cheese can turn grainy or oily instead of smooth.

Swap the mustard

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

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

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