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Welsh Rarebit

A savory cheese sauce served over toast or wafers.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 8 ingredients
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Why it works: Butter and milk are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 81,283 recipes. Both carry (z)-4-heptenal, which smells biscuit, cream. The science ↓

Welsh Rarebit

Ingredients

Directions

  1. Place the cheese in a double boiler and sprinkle over the mixed seasonings.

  2. Add the butter in pieces and the milk.

  3. When the cheese is melted, stir in the well-beaten eggs.

  4. Cook for a moment and serve on toast or wafers.

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 + milktop 7% of all pairs
    Smell alikemoderate
    Cooked together81,283 recipes

    Shared aroma: (z)-4-heptenal (biscuit, cream).

  2. Cheese + buttertop 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. Cheese + milktop 10% of all pairs
    Smell alikemoderate
    Cooked together4,426 recipes

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

  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 a smooth, creamy sauce that carries the flavour of the dish.
Eggs
Thicken the melted cheese into a custard-like sauce as they cook gently.
Butter
Adds richness and helps the cheese melt smoothly into a glossy sauce.
Mustard
Adds sharpness that balances the richness of the cheese and eggs.

The step that matters

Stir in the eggs over gentle heat. Eggs thicken when heated gently, but high heat or long cooking can curdle them and leave the sauce grainy. Keeping the double boiler at a gentle heat lets the eggs set into a smooth sauce.

Swap the mustard

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

  1. Potatofits better
  2. Capsicumfits better
  3. Asparagusfits better
  4. Mustardthe original

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