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Stewed Onions

Onions stewed in browned butter with a thin butter sauce, seasoned with salt and pepper.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 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 ↓

Stewed Onions

Oven, in the book's wordsA brisk oven

Ingredients

Directions

The book says “a brisk oven”. The 400°F (200°C) in the steps is the modern equivalent, not the book's own figure.

Prepare

  1. Peel and slice the onions.

  2. In a dish, combine the onions with the browned butter.

Bake and finish

  1. Place the dish in a 400°F (200°C) oven until the onions are nicely browned.

  2. Pour the thin butter sauce over the onions, then add salt and pepper.

  3. Let the onions stew a little longer until ready.

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. Butter + saucetop 15% of all pairs
    Smell alikelow
    Cooked together15,338 recipes

    Shared aroma: ethanol (alcoholic, ethereal).

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

    Shared aroma: decanal (soap, orange peel).

  4. Onion + saucetop 19% of all pairs
    Smell alikelow
    Cooked together10,474 recipes

    Shared aroma: ethanol (alcoholic, ethereal).

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

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

Butter and sauce barely smell alike, yet cooks put them together in 15,338 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

Onions
Form the main body of the dish, and their sugars brown and turn sweet in the oven.
Butter
Adds fat and richness, and the browned butter contributes toasty, nutty flavor.
Thin butter sauce
Adds moisture and richness, helping the onions stew gently rather than dry out.

The step that matters

Browning the onions in the oven. Browning relies on heat breaking down the onions' sugars and proteins, which creates color and deep flavor. Pulling the dish too early leaves the onions pale and flat, while the sauce added afterward helps keep them moist as they finish.

Swap the onion

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

  1. Capsicumfits better
  2. Tomatofits about as well
  3. Mustardfits about as well
  4. Onionthe original

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