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Welsh Rare Bit

A cheese-based sauce served on split crackers.

From an old cookbook · modernised transcription
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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 Rare Bit

Ingredients

Directions

Make the sauce

  1. Melt the cheese in a saucepan over low heat.

  2. When nearly melted, add the eggs, cream or milk, mustard, salt, melted butter, cayenne, and baking soda.

  3. Cook the mixture until it thickens.

Serve

  1. Serve the Welsh rarebit on split crackers.

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

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

  5. Cheese + creamtop 15% of all pairs
    Smell alikemoderate
    Cooked together2,655 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

Cheese
Melts into the sauce and provides the rich, savory body and flavor.
Eggs
Set as they heat, thickening the sauce and giving it structure.
Cream or milk
Adds moisture and keeps the sauce smooth and pourable.
Mustard
Adds a sharp, tangy note that balances the richness of the cheese.

The step that matters

Cook the mixture until it thickens. Eggs thicken by setting as their proteins coagulate. Too much heat curdles them and makes the cheese grainy and oily.

Swap the mustard

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

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

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