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Green Peas

Cooked green peas with butter, onion, parsley, and lettuce.

From an old cookbook · modernised transcription
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Green Peas

Why it works: Parsley and lettuce match in chemistry and in kitchens. They rank in the top 5% of all ingredient pairs, and cooks put them together in 1,483 recipes. Both carry trans-2-hexenal, which smells green, leafy. The science ↓

Green Peas

Ingredients

Directions

  1. In a covered saucepan, melt the butter over low heat.

  2. Add the peas, onion, parsley, and lettuce.

  3. Cook for 1.5 hours, shaking the saucepan every few minutes to prevent burning.

  4. Do not wash the peas beforehand.

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.

Photo for illustrative purposes only · Contact us to use it

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. Parsley + lettucetop 5% of all pairs
    Smell alikestrong
    Cooked together1,483 recipes

    Shared aroma: trans-2-hexenal (green, leafy).

  2. Peas + lettucetop 5% of all pairs
    Smell alikestrong
    Cooked together1,293 recipes

    Shared aroma: 2-isobutyl-3-methoxypyrazine (green bell pepper, earthy).

  3. Onion + lettucetop 8% of all pairs
    Smell alikestrong
    Cooked together3,562 recipes

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

  4. Onion + parsleytop 9% of all pairs
    Smell alikemoderate
    Cooked together25,843 recipes

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

  5. Peas + parsleytop 13% of all pairs
    Smell alikemoderate
    Cooked together1,885 recipes

    Shared aroma: trans-2-hexenal (green, leafy).

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

What each ingredient does

Green peas
Forms the main bulk of the dish and becomes tender and sweet as they cook.
Butter
Adds fat and richness, and helps the vegetables cook gently in the pan.
Onion
Softens and turns sweet and aromatic during slow cooking.
Lettuce
Releases moisture as it cooks, helping to form a tender, juicy base.
Parsley
Contributes a fresh, herbal aroma to the finished dish.

The step that matters

Cooking for 1.5 hours over low heat in a covered pan. Low heat and a covered pan let the peas soften slowly while trapping their own moisture. Shaking the pan every few minutes keeps the contents moving so they do not stick and scorch on the base.

Swap the peas

How well each one fits the dish's main ingredients (butter, onion, parsley, lettuce):

  1. Chickpeafits better
  2. Lentilsfits better
  3. Beansfits better
  4. Peasthe original

Fit is the average pairing score against butter, onion, parsley, lettuce. 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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