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Thickened Milk

A thickened milk made by whisking egg yolk, flour, and salt, then adding to boiling milk.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 4 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 ↓

Thickened Milk

Ingredients

Directions

Prepare the thickener

  1. Beat the egg yolk with a pinch of salt until light.

  2. Mix in sifted flour until very stiff.

  3. Rub the mixture between your fingers, adding more flour until dry and powdered.

Thicken the milk

  1. In a pot, heat the desired amount of fresh milk until it boils.

  2. Sprinkle a little of the powder on the boiling milk and let it sit for a moment before stirring.

  3. Repeat until the mixture thickens to your liking.

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. Egg + flourtop 15% of all pairs
    Smell alikelow
    Cooked together106,462 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  3. Egg + milktop 18% of all pairs
    Smell alikemoderate
    Cooked together88,785 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

Egg yolk
Adds richness and helps bind the flour into a dry, crumbly powder.
Sifted flour
Provides the starch that thickens the milk once the powder is heated.
Milk
Forms the liquid base that the starch thickens into a smooth mixture.

The step that matters

Sprinkling the powder on boiling milk. Adding too much powder at once can form lumps that are hard to smooth out. Starch needs heat to swell and thicken, so adding it a little at a time and letting it sit briefly before stirring gives an even result.

“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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