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Welsh Rarebit

A cheese sauce made with butter, ale, eggs, and seasonings, served over buttered toast.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 9 ingredients
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Why it works: Celery and mustard are a kitchen classic. They rank in the top 2% of all ingredient pairs, and cooks put them together in 4,169 recipes. Both carry guaiacol, which smells smoky, sweet. The science ↓

Welsh Rarebit

Ingredients

Directions

Make the sauce

  1. Melt the butter in a wide saucepan over medium heat until it hisses.

  2. Stir in the cheese, then add the dry seasonings while stirring.

  3. Beat the eggs separately until very light, then mix in three spoonfuls of the hot cheese mixture.

  4. Pour the warmed egg mixture into the saucepan, stirring continuously.

  5. After one minute, add the Worcestershire sauce and lemon juice.

Serve

  1. Serve the mixture on rounds of hot, buttered toast.

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. Celery + mustardtop 2% of all pairs
    Smell alikemoderate
    Cooked together4,169 recipes

    Shared aroma: guaiacol (smoky, sweet).

  2. Lemon + peppertop 3% of all pairs
    Smell alikestrong
    Cooked together27,047 recipes

    Shared aroma: trans-2-nonenal (cardboard, fatty).

  3. Lemon + celerytop 3% of all pairs
    Smell alikestrong
    Cooked together3,467 recipes

    Shared aroma: beta-phellandrene (minty, terpene).

  4. Celery + peppertop 5% of all pairs
    Smell alikestrong
    Cooked together16,012 recipes

    Shared aroma: 4'-methylacetophenone (bitter almond).

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

Soft grated cheese
Melts into the sauce to give it its rich, savoury body.
Eggs
Thicken the sauce and add structure as they gently set with the heat.
Ale
Adds liquid and a slightly bitter, malty flavour that balances the rich cheese.
Butter
Enriches the sauce and helps it stay smooth as the cheese melts.
Worcestershire sauce
Adds savoury depth and umami to the cheese mixture.

The step that matters

Adding the eggs to the hot cheese. Egg proteins set at about 70°C and scramble if the mixture is too hot or added too quickly. Tempering with hot cheese first, then stirring continuously over moderate heat, keeps the sauce smooth and thick.

Swap the lemon

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

  1. Lemonthe original
  2. Avocadofits about as well
  3. Limefits less well
  4. Figfits less well

Fit is the average pairing score against cheese, egg, butter, sauce, celery, pepper, mustard. 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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