Skip to main content
Main

Boiled Onions

Boiled onions simmered in milk, butter, and flour after cooking in salted water.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
Jump to recipe ↓

Why it works: Milk and butter 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. Trim the outer layers of the young onions until you reach the crisp skin.

  2. Place the onions in a pot of boiling water with a little salt.

Cook

  1. Cook steadily for 60 minutes for young onions or 75 minutes for old onions.

Finish and serve

  1. Drain the water and add 1 cup of milk, 1 tablespoon of butter, and 1 teaspoon of flour to the onions.

  2. Simmer for 5 minutes and 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. Milk + buttertop 7% of all pairs
    Smell alikemoderate
    Cooked together81,283 recipes

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

  2. Butter + flourtop 12% of all pairs
    Smell alikelow
    Cooked together124,287 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  3. Milk + flourtop 14% of all pairs
    Smell alikelow
    Cooked together78,219 recipes

    Shared aroma: isobutyraldehyde (malty, green).

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

    Shared aroma: decanal (soap, orange peel).

  5. Onion + flourtop 17% of all pairs
    Smell alikemoderate
    Cooked together32,460 recipes

    Shared aroma: isobutyraldehyde (malty, green).

Butter and flour barely smell alike, yet cooks put them together in 124,287 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

Young onions
Provide the main body of the dish, softening into a tender, mild vegetable.
Milk
Forms the creamy liquid that coats the onions and gives a rich texture.
Butter
Adds fat for richness and a smooth mouthfeel to the sauce.
Flour
Thickens the milk into a light sauce as it simmers.

The step that matters

Simmer after adding the milk, butter and flour. Flour needs heat and stirring time to thicken the milk properly. Simmering too hard can scorch the milk or break the sauce, so keep the heat gentle.

Swap the onion

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

  1. Potatofits better
  2. Arrowrootfits better
  3. Leekfits better
  4. Onionthe original

Fit is the average pairing score against milk, butter, flour. 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