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Onion Soup Puree

A pureed onion soup made with onions, broth, butter, salt, pepper, and served over toasted bread.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Why it works: Butter and bread are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 27,232 recipes. Both carry delta-decalactone, which smells sweet, creamy. The science ↓

Onion Soup Puree

Ingredients

Directions

Cook the soup

  1. Slice the onions and fry them in a stew pan with a little butter.

  2. Add the broth and let it boil until the onions are well done, about 30 minutes.

  3. Pass the mixture through a tamper.

  4. Bring it to a boil again, then season with salt and pepper to taste.

Serve

  1. Serve hot over diced 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. Butter + breadtop 7% of all pairs
    Smell alikemoderate
    Cooked together27,232 recipes

    Shared aroma: delta-decalactone (sweet, creamy).

  2. Onion + peppertop 11% of all pairs
    Smell alikemoderate
    Cooked together68,474 recipes

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

  3. Onion + buttertop 15% of all pairs
    Smell alikemoderate
    Cooked together42,912 recipes

    Shared aroma: decanal (soap, orange peel).

  4. Onion + breadtop 15% of all pairs
    Smell alikemoderate
    Cooked together8,676 recipes

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

  5. Pepper + breadtop 16% of all pairs
    Smell alikemoderate
    Cooked together20,964 recipes

    Shared aroma: 2-nonenal (fatty, green).

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

What each ingredient does

Onions
Soften and caramelize during long cooking, adding sweetness and body to the soup.
Broth
Forms the liquid base, providing moisture and the savory backbone of the soup.
Butter
Fat that helps fry the onions and carries their flavor into the soup.

The step that matters

Cook the onions until well done. Onions must cook long enough to soften and turn sweet as their sugars brown slowly. Stopping early leaves the soup sharp and raw-tasting.

Swap the onion

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

  1. Capsicumfits better
  2. Tomatofits better
  3. Potatofits about as well
  4. Onionthe original

Fit is the average pairing score against butter, pepper, 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.

More onion soup recipes

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