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Spanish Rice

A simple rice dish cooked with tomatoes, onion, green peppers, and salt.

From an old cookbook · modernised transcription
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Why it works: Rice and tomato match in chemistry and in kitchens. They rank in the top 6% of all ingredient pairs, and cooks put them together in 3,065 recipes. Both carry trans-2-nonenal, which smells cardboard, fatty. The science ↓

Spanish Rice

Ingredients

Directions

  1. Combine rice, tomatoes, onion, green peppers, and salt in a double boiler.

  2. Cook for 3 hours.

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 + tomatotop 6% of all pairs
    Smell alikestrong
    Cooked together3,065 recipes

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

  2. Tomato + peppertop 7% of all pairs
    Smell alikemoderate
    Cooked together17,923 recipes

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

  3. Tomato + oniontop 8% of all pairs
    Smell alikemoderate
    Cooked together20,633 recipes

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

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

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

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

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

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

What each ingredient does

Rice
Starch that absorbs the tomato liquid and onion flavour as it cooks, giving the dish its body.
Tomatoes
Provide moisture and acidity that cook into the rice to form the sauce.
Onion
Adds savoury sweetness and aroma as it softens during the long cook.
Green sweet peppers
Add fresh, slightly bitter vegetable flavour and some texture to the dish.

The step that matters

Cook for 3 hours. A double boiler holds the heat gently, so the mixture cooks slowly without scorching. Checking that the water underneath keeps simmering helps the rice cook through evenly.

Swap the onion

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

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

Fit is the average pairing score against rice, tomato, 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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