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Green Onion Toast

A toast topped with boiled green onions, butter, ketchup, and seasonings.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 7 ingredients
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Why it works: Sugar and ketchup match in chemistry and in kitchens. They rank in the top 8% of all ingredient pairs, and cooks put them together in 260 recipes. Both carry ethanol, which smells alcoholic, ethereal. The science ↓

Green Onion Toast

Ingredients

Directions

Prepare

  1. Trim any withered parts from the green onions and cut them into half-inch lengths.

Cook the onions

  1. Place the onions in a saucepan with boiling water to barely cover, add salt, sugar, and powdered mint or sage.

  2. Cook gently for 30 minutes, then add the white parts of the onions cut into rings and stew for another 15 minutes.

Finish and serve

  1. Stir in the butter, a little ketchup, and any additional seasoning as needed.

  2. Serve the mixture on toast.

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. Sugar + ketchuptop 8% of all pairs
    Smell alikestrong
    Cooked together260 recipes

    Shared aroma: ethanol (alcoholic, ethereal).

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

    Shared aroma: decanal (soap, orange peel).

  3. Sugar + buttertop 17% of all pairs
    Smell alikemoderate
    Cooked together98,233 recipes

    Shared aroma: guaiacol (smoky, sweet).

  4. Onion + minttop 18% of all pairs
    Smell alikemoderate
    Cooked together2,389 recipes

    Shared aroma: 2,4-decadienal (seaweed).

  5. Onion + ketchuptop 19% of all pairs
    Smell alikelow
    Cooked together1,997 recipes

    Shared aroma: ethanol (alcoholic, ethereal).

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

What each ingredient does

Green onions
Form the main body of the dish, softening into a soft, savoury mass as they stew.
Butter
Adds richness and a smooth, silky texture to the cooked onions.
Ketchup
Adds a touch of acidity and sweetness to balance the savoury onions.

The step that matters

Cook gently for 30 minutes. Gentle heat with just enough water lets the onions soften and release their sweetness slowly. Boiling hard can scorch the bottom of the pan or leave the onions tough and watery.

Swap the mint

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

  1. Garlicfits better
  2. Capersfits better
  3. Celeryfits better
  4. Mintthe original

Fit is the average pairing score against onion, sugar, butter, ketchup. 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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