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Black Bean Soup

A hearty soup made from soaked black beans, seasoned with salt, pepper, cloves, and lemon, served with sliced hard‑boiled egg and toasted bread.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 8 ingredients
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Why it works: Pepper and lemon match in chemistry and in kitchens. They rank in the top 3% of all ingredient pairs, and cooks put them together in 27,047 recipes. Both carry trans-2-nonenal, which smells cardboard, fatty. The science ↓

Black Bean Soup

Ingredients

Directions

Prepare the beans

  1. Soak the black beans overnight and keep them warm.

  2. Drain the water and add fresh water.

Cook and season

  1. Cook gently for 4 to 6 hours, adding water as it boils away.

  2. Season with salt, pepper, and cloves while cooking.

Strain and serve

  1. When done, strain thoroughly.

  2. Add the lemon slices, sliced hard-boiled egg, and toasted bread.

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. Pepper + lemontop 3% of all pairs
    Smell alikestrong
    Cooked together27,047 recipes

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

  2. Pepper + clovetop 5% of all pairs
    Smell alikestrong
    Cooked together17,451 recipes

    Shared aroma: ethyl octanoate (fruity, wine).

  3. Beans + clovetop 9% of all pairs
    Smell alikestrong
    Cooked together908 recipes

    Shared aroma: 2-heptanol (bitter, floral).

  4. Clove + lemontop 10% of all pairs
    Smell alikestrong
    Cooked together8,150 recipes

    Shared aroma: eucalyptol (eucalyptus, herbal).

  5. Beans + peppertop 11% of all pairs
    Smell alikemoderate
    Cooked together4,733 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

Black beans
Form the body and bulk of the soup as they soften and break down during cooking.
Cloves
Add a warm, aromatic spice flavour that seasons the soup during cooking.

The step that matters

Cook gently for 4 to 6 hours, adding water as it boils away. Gentle heat softens the beans evenly without bursting their skins, while keeping the liquid topped up prevents scorching and keeps the soup from thickening too much.

Swap the beans

How well each one fits the dish's main ingredients (pepper, clove, lemon, egg, bread):

  1. Chickpeafits better
  2. Chestnutfits about as well
  3. Walnutfits about as well
  4. Beansthe original

Fit is the average pairing score against pepper, clove, lemon, egg, bread. 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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