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Onions, Stewed

Stewed onions simmered in butter, powdered sugar, and brown gravy, served hot on toast.

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 ↓

Onions, Stewed

Ingredients

Directions

Prepare

  1. Peel and trim the onions, keeping the tops intact.

  2. Blanch the onions in boiling water for 1–2 minutes, then drain.

  3. Place the onions in a single layer in a large saucepan.

  4. Sprinkle salt and pepper over the onions.

  5. Top each onion with ½ ounce of butter mixed with ½ teaspoon of powdered sugar.

Cook and serve

  1. Cook over gentle heat until lightly browned.

  2. Cover the onions with brown gravy and simmer until tender, about 1½ hours.

  3. Serve hot on toast with gravy poured around them.

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 + sugartop 17% of all pairs
    Smell alikemoderate
    Cooked together98,233 recipes

    Shared aroma: guaiacol (smoky, sweet).

  4. Pepper + buttertop 21% of all pairs
    Smell alikemoderate
    Cooked together85,593 recipes

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

  5. Pepper + sugartop 32% of all pairs
    Smell alikelow
    Cooked together19,401 recipes

    Shared aroma: 2-nonenal (fatty, green).

Pepper and sugar barely smell alike, yet cooks put them together in 19,401 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

Spanish onions
Provide the main body and sweetness that softens and browns during slow cooking.
Butter
Adds fat and richness, helping the onions brown and carrying flavour.
Powdered sugar
Speeds browning and adds a touch of sweetness to the onions.
Brown gravy
Supplies liquid for simmering, moisture, and savoury depth as the onions become tender.

The step that matters

Cook over gentle heat until lightly browned. Low heat lets the onion sugars caramelise slowly for colour and sweetness without scorching the butter and sugar. High heat would burn the surface before the centres soften.

Swap the onion

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

  1. Capsicumfits better
  2. Potatofits better
  3. Sweet potatofits better
  4. Onionthe original

Fit is the average pairing score against pepper, butter, sugar. 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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