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Welsh Rarebit

A cheese and mustard sauce served over crackers.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 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 rarebit

  1. Melt the butter in a chafing dish.

  2. Add the corn starch and stir until well mixed.

  3. Gradually add the cream while stirring constantly and cook for two minutes.

  4. Add the cheese and stir until melted.

Serve

  1. Serve with 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. Butter + creamtop 8% of all pairs
    Smell alikemoderate
    Cooked together41,516 recipes

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

  2. Butter + cheesetop 8% of all pairs
    Smell alikemoderate
    Cooked together7,962 recipes

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

  3. Mustard + peppertop 9% of all pairs
    Smell alikemoderate
    Cooked together15,430 recipes

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

  4. Corn + peppertop 11% of all pairs
    Smell alikemoderate
    Cooked together5,324 recipes

    Shared aroma: 2-nonenal (fatty, green).

  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 give it body and its rich, savoury flavour.
Cream
Adds moisture and richness, forming the smooth base of the sauce.
Corn starch
Thickens the cream as it heats, giving the sauce a smooth, coating texture.
Butter
Adds fat and flavour to the base before the cream goes in.
Mustard
Adds sharp, tangy flavour that balances the richness of the cheese.

The step that matters

Adding the cream gradually while stirring constantly. Starch granules clump if liquid is added too fast or unstirred. Constant stirring spreads them evenly so the cream thickens into a smooth sauce rather than lumps.

Swap the mustard

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

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

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