Name: Welsh Rabbit or Rare-Bit
Ingredients: 2 ounces mild dry cheese, grated; 1 ounce butter; 2 teaspoons prepared mustard; ¼ teaspoon salt; ¼ teaspoon Nepaul pepper; 1 well-beaten egg; 2 slices of bread, toasted and buttered

Why it works: Butter and bread 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 Rabbit or Rare-Bit

Oven, in the book's wordsA hot oven

Ingredients

Directions

The book says “a hot oven”. The 400°F (200°C) in the steps is the modern equivalent, not the book's own figure.

Prepare

Preheat oven to 400°F (200°C).

Make the cheese mixture

In a bowl, mix the grated cheese, butter, mustard, salt, pepper, and egg until smooth.
If the mixture is too thin, add more grated cheese.

Bake and serve

Spread the cheese mixture thickly over the buttered toast.
Place the toast on a buttered dish and bake for 8-10 minutes until nicely colored.

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.

Butter + breadtop 7% of all pairs

Smell alikemoderate

Cooked together27,232 recipes

Shared aroma: delta-decalactone (sweet, creamy).
Cheese + breadtop 7% of all pairs

Smell alikemoderate

Cooked together2,130 recipes

Shared aroma: delta-decalactone (sweet, creamy).
Cheese + buttertop 8% of all pairs

Smell alikemoderate

Cooked together7,962 recipes

Shared aroma: delta-dodecalactone (sweet, creamy).
Mustard + peppertop 9% of all pairs

Smell alikemoderate

Cooked together15,430 recipes

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

Mild dry cheese: Melts and sets into the rich, savoury body of the topping.
Egg: Binds the cheese mixture so it holds together and sets when baked.
Butter: Adds fat that makes the mixture smooth and spreadable and helps it brown.
Prepared mustard: Adds sharp, tangy flavour that balances the richness of the cheese.
Bread: Provides a toasted base that holds the topping and adds a crisp contrast.

The step that matters

Baking until nicely colored. Cheese proteins and milk sugars brown and set at high heat, but overbaking can make the topping dry and rubbery. Watch closely during the 8-10 minutes.

Swap the mustard

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

Capsicumfits better
Asparagusfits about as well
Potatofits about as well
Mustardthe original

Fit is the average pairing score against cheese, butter, pepper, egg, bread. 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.

Brown Bread461 recipes

Macaroni and Cheese102 recipes

White Bread80 recipes

Bread Omelette60 recipes

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Welsh Rabbit or Rare-Bit