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Lentil Vegetable Soup

A hearty soup of lentils and root vegetables simmered for hours, seasoned with salt, pepper, and optional butter or sherry.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 10 ingredients
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Why it works: Parsnip and turnip match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 590 recipes. Both carry coumarin, which smells sweet, hay. The science ↓

Lentil Vegetable Soup

Ingredients

Directions

Prepare

  1. Soak the lentils overnight.

  2. Chop the carrot, parsnip, turnip, and onion into small pieces.

  3. Combine the lentils and chopped vegetables in a pot.

Cook and season

  1. Cook on low heat for three hours.

  2. Season with salt, black pepper, and butter, or with salt, Nepaul or Paprika pepper, and sherry wine.

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. Parsnip + turniptop 1% of all pairs
    Smell alikestrong
    Cooked together590 recipes

    Shared aroma: coumarin (sweet, hay).

  2. Carrot + parsniptop 1% of all pairs
    Smell alikestrong
    Cooked together1,097 recipes

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

  3. Lentils + turniptop 1% of all pairs
    Smell alikestrong
    Cooked together109 recipes

    Shared aroma: coumarin (sweet, hay).

  4. Lentils + parsniptop 1% of all pairs
    Smell alikestrong
    Cooked together42 recipes

    Shared aroma: coumarin (sweet, hay).

  5. Carrot + turniptop 1% of all pairs
    Smell alikestrong
    Cooked together8,002 recipes

    Shared aroma: coumarin (sweet, hay).

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

What each ingredient does

Lentils
Provide the main body and thickness of the soup as they soften during long cooking.
Carrot
Adds natural sweetness and body to the broth as it cooks down.
Parsnip
Contributes sweetness and a starchy texture that thickens the soup slightly.
Turnip
Adds mild sweetness and soft texture after long, gentle simmering.
Onion
Builds savoury depth and aroma as it softens into the broth.

The step that matters

Cook on low heat for three hours. Gentle, long simmering lets the lentils and root vegetables soften fully and release their flavour into the liquid. Boiling hard can break the lentils apart and cloud the broth, so keep the heat low and the pot covered enough to hold moisture.

Swap the onion

How well each one fits the dish's main ingredients (lentils, carrot, parsnip, turnip, pepper, butter, sherry):

  1. Leekfits better
  2. Beetrootfits better
  3. Spinachfits better
  4. Onionthe original

Fit is the average pairing score against lentils, carrot, parsnip, turnip, pepper, butter, sherry. 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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