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Welsh Rarebit

A cheese-based toast topped with butter, mustard, cayenne pepper, and bread crumbs.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Why it works: Bread and butter are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 27,232 recipes. Both carry delta-decalactone, which smells sweet, creamy. The science ↓

Welsh Rarebit

Ingredients

Directions

Prepare

  1. Rub the bottom of a heated pan with butter.

Make the rarebit

  1. Add the grated cheese and stir quickly until melted.

  2. Mix in the butter, mustard, cayenne pepper, and dry bread crumbs.

  3. Spread the mixture hot on toast.

  4. Serve immediately.

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. Bread + buttertop 7% of all pairs
    Smell alikemoderate
    Cooked together27,232 recipes

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

  2. Milk + buttertop 7% of all pairs
    Smell alikemoderate
    Cooked together81,283 recipes

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

  3. Cheese + breadtop 7% of all pairs
    Smell alikemoderate
    Cooked together2,130 recipes

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

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

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

  5. Pepper + mustardtop 9% of all pairs
    Smell alikemoderate
    Cooked together15,430 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, rich sauce that coats the toast.
Fine bread crumbs
Soaked in milk, they thicken the melted cheese and help it hold together.
Mustard
Adds sharp, tangy flavor that cuts through the richness of the cheese.
Cayenne pepper
Adds gentle heat that sharpens the flavor of the cheese.

The step that matters

Stir the cheese quickly until melted. Cheese turns stringy, greasy, or grainy when overheated or heated too long, because its proteins tighten and its fat separates. Keeping the heat moderate and stirring constantly gives a smooth, cohesive sauce.

Swap the mustard

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

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

Fit is the average pairing score against cheese, bread, milk, 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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