Name: Shrewsbury Biscuit
Ingredients: ½ cup butter; 2 cups flour; ½ cup sugar; 1 egg

Why it works: Butter and flour are a kitchen classic. They rank in the top 12% of all ingredient pairs, and cooks put them together in 124,287 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓

Shrewsbury Biscuit

Oven, in the book's wordsA slow oven

Ingredients

½ cup butter
2 cups flour
½ cup sugar
1 egg

Directions

The book says “a slow oven”. The 300°F (150°C) in the steps is the modern equivalent, not the book's own figure.

Make the dough

Cream the butter in a mixing bowl.
Gradually add the sugar while continuing to beat the mixture.
Add the well-beaten egg and mix well.
Stir in the flour until combined.

Shape and bake

Toss the dough on a floured surface and roll it very thin.
Use a round cutter dipped in flour to shape the biscuits.
Place the biscuits on a baking sheet.
Bake in a cool oven at 300°F (150°C) until lightly golden.

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 + flourtop 12% of all pairs

Smell alikelow

Cooked together124,287 recipes

Shared aroma: isobutyraldehyde (malty, green).
Flour + sugartop 15% of all pairs

Smell alikemoderate

Cooked together92,116 recipes

Shared aroma: phenylacetaldehyde (hawthorne, honey).
Flour + eggtop 15% of all pairs

Smell alikelow

Cooked together106,462 recipes

Shared aroma: isobutyraldehyde (malty, green).
Butter + eggtop 17% of all pairs

Smell alikemoderate

Cooked together118,967 recipes

Shared aroma: decanal (soap, orange peel).
Butter + sugartop 17% of all pairs

Smell alikemoderate

Cooked together98,233 recipes

Shared aroma: guaiacol (smoky, sweet).

Butter and flour barely smell alike, yet cooks put them together in 124,287 recipes: they work on texture and structure more than aroma.

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

What each ingredient does

Butter: Creamed with sugar to trap air and give the biscuits a tender, crumbly texture.
Flour: Provides the structure that holds the dough together once baked.
Sugar: Sweetens the biscuits and helps them brown lightly as they bake.
Egg: Binds the dough and adds richness and structure.

“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.