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Soup

Rice-and-Onion Soup

A simple soup made with rice, onions, water, salt, and pepper.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 ingredients
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Why it works: Rice and onion are a kitchen classic. They rank in the top 9% of all ingredient pairs, and cooks put them together in 10,433 recipes. Both carry 2,4-decadienal, which smells seaweed. The science ↓

Rice-and-Onion Soup

Ingredients

Directions

The book gives no cooking times; the times in the steps were added in transcription, so check for doneness rather than trusting the clock.

Prepare

  1. Rinse the rice under cold water until the water runs clear.

  2. Chop the onions finely.

Cook

  1. In a pot, bring the water to a boil and add the rice and onions.

  2. Season with salt and pepper.

  3. Simmer until the rice is tender, about 20 minutes.

  4. Serve hot.

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. Rice + oniontop 9% of all pairs
    Smell alikemoderate
    Cooked together10,433 recipes

    Shared aroma: 2,4-decadienal (seaweed).

  2. Onion + peppertop 11% of all pairs
    Smell alikemoderate
    Cooked together68,474 recipes

    Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).

  3. Rice + peppertop 12% of all pairs
    Smell alikemoderate
    Cooked together8,379 recipes

    Shared aroma: trans-2-nonenal (cardboard, fatty).

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

What each ingredient does

Rice
Starch that softens as it simmers, thickening the soup and giving it body.
Onions
Aromatic base that adds savory sweetness as it cooks into the broth.

Swap the onion

How well each one fits the dish's main ingredients (rice, pepper):

  1. Capsicumfits better
  2. Carrotfits better
  3. Tomatofits better
  4. Onionthe original

Fit is the average pairing score against rice, pepper. 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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