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Boiled Onions

A simple dish of onions boiled until tender, then seasoned with butter, salt, and pepper.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Why it works: Onion and pepper are a kitchen classic. They rank in the top 11% of all ingredient pairs, and cooks put them together in 68,474 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓

Boiled Onions

Ingredients

Directions

Prepare

  1. Peel the onions and cut off the ends.

  2. Place the onions in a pot with cold water and scald for 3 minutes.

Cook and serve

  1. Drain the water, add cold salted water, and boil slowly until tender, about 30 minutes or longer depending on size.

  2. Drain and dry the onions.

  3. Pour 1 tablespoon of melted butter over the onions.

  4. Sprinkle with salt and pepper, then serve.

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

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

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

    Shared aroma: decanal (soap, orange peel).

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

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

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

What each ingredient does

Onions
Form the dish itself, becoming soft and sweet as they cook through.
Butter
Adds fat and richness, coating the onions with flavour.

The step that matters

Boil slowly until tender. Boiling gently lets the onions cook through evenly without breaking apart or turning mushy on the outside. Size changes the time needed, so test for tenderness with a knife rather than relying only on the clock.

Swap the onion

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

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

Fit is the average pairing score against butter, pepper. 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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