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Dessert

Threadneedle Street Biscuits

A biscuit made with sifted flour, butter, sugar, milk, optional baking soda and caraway seeds.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Why it works: Flour and caraway match in chemistry and in kitchens. They rank in the top 6% of all ingredient pairs, and cooks put them together in 1,435 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓

Threadneedle Street Biscuits

Oven, in the book's wordsA very slow oven

Ingredients

Directions

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

Make the dough

  1. Mix the flour and butter until it resembles small crumbs.

  2. Add the sugar and combine with enough milk to form a firm paste.

  3. Beat the mixture vigorously with a rolling pin until smooth.

Shape and bake

  1. Roll the dough to a thickness of ⅓ inch and cut into squares.

  2. Bake in a slow oven at 300°F (150°C) until crisp throughout.

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. Flour + carawaytop 6% of all pairs
    Smell alikestrong
    Cooked together1,435 recipes

    Shared aroma: isobutyraldehyde (malty, green).

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

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

  3. Flour + buttertop 12% of all pairs
    Smell alikelow
    Cooked together124,287 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  4. Flour + milktop 14% of all pairs
    Smell alikelow
    Cooked together78,219 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  5. Flour + sugartop 15% of all pairs
    Smell alikemoderate
    Cooked together92,116 recipes

    Shared aroma: phenylacetaldehyde (hawthorne, honey).

Flour and butter 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

Flour
Forms the structure of the biscuits as it binds with the liquid.
Butter
Adds fat that tenderises the crumb and gives a rich flavour.
Sugar
Adds sweetness and helps the biscuits brown and crisp.
Milk
Moistens the flour so the dough can come together into a paste.

The step that matters

Beat the mixture vigorously until smooth. Working the dough with a rolling pin develops gluten and evens out the fat, giving a firm, smooth dough that bakes crisp rather than crumbly.

Swap the caraway

The recipe marks caraway as optional. How well each one fits the dish's main ingredients (flour, butter, sugar, milk):

  1. Cinnamonfits better
  2. Nutmegfits better
  3. Jalapenofits about as well
  4. Carawaythe original

Fit is the average pairing score against flour, butter, sugar, milk. 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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