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Welsh Rarebit

A cheese-based toast topping made with cream cheese, mustard, and cayenne, served hot over toasted bread.

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

The book gives no cooking times; the times in the steps were added in transcription, so check for doneness rather than trusting the clock.

Prepare

  1. Grate the cheese and heat it with the cream or milk.

  2. Prepare the toast.

Make the rarebit

  1. Mix the salt, cayenne, and mustard, then add the well-beaten egg and beat well.

  2. Once the cheese is melted, add the egg mixture and butter, cooking over hot water until thickened, stirring constantly.

  3. Do not cook for more than 2 minutes to avoid curdling.

Serve

  1. Pour the mixture over the toast and serve.

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. Cream cheese + buttertop 8% of all pairs
    Smell alikemoderate
    Cooked together2,747 recipes

    Shared aroma: ethyl octanoate (fruity, wine).

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

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

  4. Cream cheese + creamtop 14% of all pairs
    Smell alikelow
    Cooked together1,087 recipes

    Shared aroma: gamma-decalactone (peach, creamy).

  5. Egg + buttertop 17% of all pairs
    Smell alikemoderate
    Cooked together118,967 recipes

    Shared aroma: decanal (soap, orange peel).

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

What each ingredient does

Cream cheese
Melts into a smooth, rich base for the sauce.
Egg
Thickens the sauce as its proteins set during gentle heating.
Cream or milk
Loosens the melted cheese so the sauce stays smooth and pourable.
Butter
Adds richness and a silkier texture to the sauce.
Mustard
Adds a sharp flavour that balances the richness of the cheese.

The step that matters

Cook the egg mixture gently and briefly. Egg proteins set when heated, so over-cooking or too much heat makes the sauce grainy or curdled. Stirring constantly over hot water, and stopping once thickened, keeps it smooth.

Swap the mustard

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

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

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