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Flour Gruel

A simple porridge made by boiling flour in water, then adding it to boiling milk with salt and sugar.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 ingredients
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Why it works: Flour and milk are a kitchen classic. They rank in the top 14% of all ingredient pairs, and cooks put them together in 78,219 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓

Flour Gruel

Ingredients

Directions

Prepare the flour ball

  1. Place 1 pint of flour in a strong cotton cloth and tie it into a ball.

  2. Boil the ball in water for 4 hours, keeping it well covered.

Make the gruel

  1. Bring 1 pint of milk to a boil in a double boiler.

  2. Scrape the flour-ball and mix it with a little water to form a paste.

  3. Stir the paste into the boiling milk.

  4. Add salt and sugar if desired.

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 + milktop 14% of all pairs
    Smell alikelow
    Cooked together78,219 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. Milk + sugartop 18% of all pairs
    Smell alikelow
    Cooked together77,875 recipes

    Shared aroma: 2-nonenal (fatty, green).

Flour and milk barely smell alike, yet cooks put them together in 78,219 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

All-purpose flour
Thickens the gruel as its starch swells and sets during cooking.
Milk
Adds body, richness and a creamy texture to the gruel.
Sugar
Adds sweetness, adjusted to taste.

The step that matters

Stirring the paste into the boiling milk. Flour starch clumps when it meets hot liquid before it is dispersed. Mixing the paste smoothly with a little water first and stirring it in steadily keeps the gruel even and free of lumps.

“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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