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Spring Vegetable Soup

A light soup made with green peas, lettuce, onion, parsley, butter, water, and stock, finished with egg yolks.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 9 ingredients
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Why it works: Parsley and pepper match in chemistry and in kitchens. They rank in the top 2% of all ingredient pairs, and cooks put them together in 34,122 recipes. Both carry 4'-methylacetophenone, which smells bitter almond. The science ↓

Spring Vegetable Soup

Ingredients

Directions

Cook the vegetables

  1. Combine lettuce, onion, peas, parsley, butter, and water in a stewpan.

  2. Simmer until tender.

  3. Season with salt and pepper.

  4. Drain the juice.

Make the soup

  1. Add two-thirds of the juice to the soup stock.

  2. Add the remaining third to the beaten yolks.

  3. Heat well.

  4. When ready to serve, add the mixture to the vegetables.

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. Parsley + peppertop 2% of all pairs
    Smell alikestrong
    Cooked together34,122 recipes

    Shared aroma: 4'-methylacetophenone (bitter almond).

  2. Lettuce + parsleytop 5% of all pairs
    Smell alikestrong
    Cooked together1,483 recipes

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

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

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

  4. Lettuce + oniontop 8% of all pairs
    Smell alikestrong
    Cooked together3,562 recipes

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

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

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

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

What each ingredient does

Egg yolks
Thicken the soup and add richness as they gently set with heat.
Butter
Adds richness and a rounded, savoury flavour to the vegetables.
Green peas
Provide sweetness and a tender texture to the soup.
Soup stock
Forms the savoury liquid base that carries the whole soup.
Shredded lettuce
Softens as it cooks, adding body and mild, fresh flavour.

The step that matters

Adding the yolk mixture. Egg yolks thicken when gently heated but scramble and turn grainy if they get too hot. Keep the soup below a boil once the yolk mixture goes in, and add it only when ready to serve.

Swap the onion

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

  1. Shallotfits better
  2. Spinachfits better
  3. Asparagusfits better
  4. Onionthe original

Fit is the average pairing score against peas, lettuce, parsley, butter, egg, 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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