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Boiled Onions

Boiled onions simmered in salted water, then finished with butter, pepper, and optional cream sauce.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 ingredients
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Why it works: Butter and cream are a kitchen classic. They rank in the top 8% of all ingredient pairs, and cooks put them together in 41,516 recipes. Both carry delta-dodecalactone, which smells sweet, creamy. The science ↓

Boiled Onions

Ingredients

Directions

Prepare

  1. Remove the skins from the onions.

  2. Cook the onions in boiling salted water for 5 minutes.

  3. Change the water and continue boiling for another 10 minutes.

  4. Boil until tender, then drain the onions.

Serve

  1. Carefully place the onions on a hot dish.

  2. Add a piece of butter to the center of each onion and season with pepper and salt.

  3. Optionally, pour thick cream or a cream sauce over the onions.

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 + creamtop 8% of all pairs
    Smell alikemoderate
    Cooked together41,516 recipes

    Shared aroma: delta-dodecalactone (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 + creamtop 18% of all pairs
    Smell alikelow
    Cooked together10,827 recipes

    Shared aroma: 2-nonanone (fruity, floral).

  5. Butter + peppertop 21% of all pairs
    Smell alikemoderate
    Cooked together85,593 recipes

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

Onion and cream barely smell alike, yet cooks put them together in 10,827 recipes: they work on texture and structure more than aroma.

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

What each ingredient does

Onions
Main vegetable; boiling softens them until tender and they become sweet and mild.
Butter
Adds richness and a smooth, moist finish as it melts over the hot onions.
Thick cream or cream sauce
Optional addition that adds richness and a creamy, moist coating.

Swap the onion

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

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

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