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Onion Gruel

A simple soup made with sliced onion, bran or rolled wheat, salt, and milk, simmered until thick.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 4 ingredients
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Why it works: Wheat and milk are a kitchen classic. They rank in the top 6% of all ingredient pairs, and cooks put them together in 2,418 recipes. Both carry (e,z)-2,6-nonadienal, which smells cucumber, melon. The science ↓

Onion Gruel

Ingredients

Directions

Cook

  1. In a pot, combine the sliced onion, bran or rolled wheat, salt, and milk.

  2. Bring the mixture to a boil.

  3. Reduce heat and simmer for 15 minutes.

Serve

  1. Serve hot before bedtime.

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. Wheat + milktop 6% of all pairs
    Smell alikemoderate
    Cooked together2,418 recipes

    Shared aroma: (e,z)-2,6-nonadienal (cucumber, melon).

  2. Onion + wheattop 14% of all pairs
    Smell alikemoderate
    Cooked together858 recipes

    Shared aroma: hexanal (green, grassy).

  3. Onion + milktop 20% of all pairs
    Smell alikemoderate
    Cooked together13,418 recipes

    Shared aroma: hexanal (green, grassy).

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

What each ingredient does

Onion
Softens and turns mildly sweet as it simmers, adding aroma and body to the gruel.
Bran or rolled wheat
Absorbs liquid as it cooks, thickening the gruel and giving it a porridge-like texture.
Milk
Provides liquid and creaminess, with milk sugars adding gentle sweetness as it heats.

The step that matters

Reduce the heat before simmering. Milk boils over quickly and its sugars and proteins scorch on the base of the pot if the heat stays high. Lowering the heat after boiling keeps the gruel smooth and prevents a burnt taste.

Swap the onion

How well each one fits the dish's main ingredients (wheat, milk):

  1. Potatofits better
  2. Sweet potatofits better
  3. Tomatofits better
  4. Onionthe original

Fit is the average pairing score against wheat, 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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