Skip to main content
Main

To Boil Onions

A simple boiled onion dish seasoned with salt, pepper, and melted butter.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 ingredients
Jump to recipe ↓

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 ↓

To Boil Onions

Ingredients

Directions

Prepare

  1. Cut a small slice from the top and bottom of each onion.

  2. Peel the onions in a bowl of water.

Boil

  1. Place the onions in a saucepan and cover with boiling water.

  2. After 15 minutes, drain the water and replace it with fresh boiling water and salt.

  3. Boil until the onions are tender enough to pierce with a straw, about 40 to 60 minutes for medium-sized onions.

Serve

  1. Drain and serve with melted butter, pepper, and salt.

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

White onions
Form the main body of the dish; they soften and turn sweet as they cook in water.
Butter
Adds richness and a silky mouthfeel when melted over the cooked onions.

The step that matters

Boil until tender enough to pierce with a straw. Onions are done when the centre yields easily, not at a fixed time, because size and freshness vary. Underboiled onions stay firm and sharp, while overboiled ones turn mushy and lose shape.

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.

You might also like

Tomato SoupTomato Soup526 recipesBrown BreadBrown Bread461 recipesMutton BrothMutton Broth292 recipesYorkshire PuddingYorkshire Pudding264 recipes