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Boiled Onions

A dish of small onions boiled in milk and water, then cooked with butter, cream, salt, and pepper.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 7 ingredients
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Why it works: Butter and milk are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 81,283 recipes. Both carry (z)-4-heptenal, which smells biscuit, cream. The science ↓

Boiled Onions

Ingredients

Directions

Prepare

  1. Select uniform-sized small onions and remove the outer skin.

Cook

  1. Boil the onions in a large quantity of milk and water until tender.

  2. Drain the onions and place them in a saucepan.

  3. Add butter and cream to the saucepan.

  4. Season with salt and pepper, then stir gently to combine.

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 + milktop 7% of all pairs
    Smell alikemoderate
    Cooked together81,283 recipes

    Shared aroma: (z)-4-heptenal (biscuit, cream).

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

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

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

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

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

    Shared aroma: decanal (soap, orange peel).

  5. Cream + milktop 18% of all pairs
    Smell alikemoderate
    Cooked together29,399 recipes

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

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

What each ingredient does

Onions
Form the main body of the dish and become soft and sweet as they cook.
Butter
Adds richness and fat, giving a smooth mouthfeel to the finished onions.
Cream
Adds richness and body, helping the onions taste rounded and velvety.

The step that matters

Boil the onions until tender. Onions must be cooked through so their starches and cell walls soften and their sharp sulfur compounds mellow. Undercooked onions stay firm and pungent, while the gentle boil in milk and water helps them cook evenly without browning.

Swap the onion

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

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

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