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Split Pea Soup

A hearty soup made with split peas, potato, onion, garlic, and seasoned with salt, pepper, parsley, and finished with a cream‑flour mixture.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 10 ingredients
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Why it works: Onion and garlic match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 29,058 recipes. Both carry furaneol, which smells caramel, strawberry. The science ↓

Split Pea Soup

Ingredients

Directions

Prepare the soup

  1. In a large pot, bring 1 gallon of water to a boil.

  2. Add 1 pint of yellow split peas, 1 tablespoon of salt, 1 teaspoon of pepper, 1 large diced potato, 1 chopped onion, and 1 small piece of garlic.

Simmer

  1. Cook slowly for 3 hours.

Finish and serve

  1. In a separate bowl, dissolve 1 tablespoon of flour in 1 cup of cream.

  2. Stir the cream mixture into the soup before serving.

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. Onion + garlictop 1% of all pairs
    Smell alikestrong
    Cooked together29,058 recipes

    Shared aroma: furaneol (caramel, strawberry).

  2. Pepper + parsleytop 2% of all pairs
    Smell alikestrong
    Cooked together34,122 recipes

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

  3. Potato + oniontop 3% of all pairs
    Smell alikemoderate
    Cooked together9,023 recipes

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

  4. Potato + garlictop 4% of all pairs
    Smell alikemoderate
    Cooked together4,517 recipes

    Shared aroma: furaneol (caramel, strawberry).

  5. Garlic + parsleytop 4% of all pairs
    Smell alikestrong
    Cooked together9,308 recipes

    Shared aroma: beta-phellandrene (minty, terpene).

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

What each ingredient does

Yellow split peas
Break down during long cooking to thicken the soup and give it body.
Irish potato
Its starch helps thicken the broth and adds a smooth, creamy texture.
Cream
Adds richness and fat, softening the flavor and smoothing the finished soup.
Flour
Thickens the cream so it blends into the soup without becoming lumpy.

The step that matters

Stirring the cream mixture into the soup. Cream can curdle or separate when it meets a hot, boiling liquid, especially if it is acidic or added quickly. Stirring it in gently after the soup is off the boil keeps it smooth. The flour in the cream mixture helps stabilize it against separating.

Swap the peas

How well each one fits the dish's main ingredients (pepper, potato, onion, garlic, parsley, cream, flour):

  1. Chickpeafits better
  2. Lentilsfits better
  3. Cashew nutfits better
  4. Peasthe original

Fit is the average pairing score against pepper, potato, onion, garlic, parsley, cream, flour. 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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