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Dessert

Digestive Biscuits

Digestive biscuits are made from whole-meal and white flour, butter, salt, sugar, and water, baked until crisp.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Why it works: Flour and butter 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 ↓

Digestive Biscuits

Oven, in the book's wordsA moderate oven

Ingredients

Directions

The book says “a moderate oven”. The 350°F (175°C) in the steps is the modern equivalent, not the book's own figure.

Make the dough

  1. Mix the dry ingredients together.

  2. Melt the butter in a little water and let it cool to tepid.

  3. Add the melted butter and more water to make a stiff paste.

  4. Beat the paste with a rolling pin for a few minutes.

Shape and bake

  1. Roll out into thin sheets and cut into shapes.

  2. Prick the biscuits with a fork or biscuit docker.

  3. Bake in a moderate oven at 350°F (175°C) until crisp and pale brown.

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

    Shared aroma: isobutyraldehyde (malty, green).

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

    Shared aroma: phenylacetaldehyde (hawthorne, honey).

  3. Butter + sugartop 17% of all pairs
    Smell alikemoderate
    Cooked together98,233 recipes

    Shared aroma: guaiacol (smoky, sweet).

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

Whole-meal flour
Provides the coarse, wholesome body and nutty flavour that defines the biscuit.
White flour
Adds structure from gluten so the stiff paste holds its shape when rolled and cut.
Butter
Adds fat for a short, crumbly texture and helps the biscuits brown and crisp.
Sugar
Adds sweetness and contributes to browning during baking.

The step that matters

Bake until crisp and pale brown. Baking drives off moisture so the biscuits set crisp, while browning develops flavour. Removing them too early leaves them soft and pale, and baking too long makes them dark and bitter.

“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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