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Onion Gruel

A simple gruel made from onions, milk, oatmeal, and salt, boiled until thick.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 4 ingredients
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Why it works: Onion and milk are a kitchen classic. They rank in the top 20% of all ingredient pairs, and cooks put them together in 13,418 recipes. Both carry hexanal, which smells green, grassy. The science ↓

Onion Gruel

Ingredients

Directions

  1. Boil the sliced onions in the milk until tender.

  2. Stir in the oatmeal and salt.

  3. Continue boiling until the mixture thickens.

  4. Serve hot and enjoy before bed.

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. 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

Onions
Softened in the milk, they add savory flavor and body to the gruel.
Milk
Forms the liquid base that the oatmeal thickens as it cooks.
Oatmeal
Absorbs liquid and swells as it cooks, thickening the gruel.

The step that matters

Continue boiling until the mixture thickens. Oatmeal starch gelatinizes as it heats in liquid, so the gruel thickens only once it has boiled long enough. Stopping early leaves it thin, and boiling too hard or too long can scorch the milk on the bottom of the pan.

“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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