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Welsh Rarebit

A savory cheese and egg mixture served over buttered toast.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Why it works: Cheese and butter are a kitchen classic. They rank in the top 8% of all ingredient pairs, and cooks put them together in 7,962 recipes. Both carry delta-dodecalactone, which smells sweet, creamy. The science ↓

Welsh Rarebit

Ingredients

Directions

Make the cheese sauce

  1. Melt the butter in a small frying pan over medium heat.

  2. Add the cheese slices and cook for about 5 minutes.

  3. Stir in the beaten eggs, mustard, and pepper.

Assemble and serve

  1. Prepare slices of buttered toast.

  2. Pour the cheese mixture over the toast and serve immediately while hot.

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

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

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

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

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

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

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

    Shared aroma: decanal (soap, orange peel).

  5. Cheese + peppertop 18% of all pairs
    Smell alikemoderate
    Cooked together7,861 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, providing the rich body and savory flavor of the dish.
Eggs
Thicken the cheese mixture as they set with gentle heat, giving it a creamy texture.
Butter
Melts to form the fat base that smooths the cheese and carries flavor into the sauce.
Mixed mustard
Adds a sharp, tangy note that balances the richness of the cheese and eggs.

The step that matters

Stir in the beaten eggs gently over moderate heat. Eggs thicken when heated, but too much heat can scramble them and leave the sauce grainy instead of smooth and creamy.

Swap the mustard

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

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

Fit is the average pairing score against cheese, egg, butter, 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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