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Spanish Onions Fried

A fried onion dish seasoned with butter, salt, pepper, and cayenne, served over toast with its cooking gravy.

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 ↓

Spanish Onions Fried

Oven, in the book's wordsA hot oven

Ingredients

Directions

Prepare

  1. Peel and slice the onions.

  2. Heat the butter in a frying pan until smoking hot.

Cook

  1. Add the onions, salt, pepper, and a light dusting of cayenne pepper.

  2. Stir over the heat until the onions are tender.

Serve

  1. Serve the onions on toast, pouring the cooking gravy over 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 + 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

Spanish onions
Provide the main body of the dish, softening as they cook and turning sweet.
Butter
Conducts heat into the onions and adds richness and browning flavor.
Salt
Seasons the onions and draws out moisture to help them soften.

The step that matters

Heating the butter until smoking hot before adding the onions. Very hot fat sears the onion surfaces and starts browning quickly, giving flavor. If the pan is not hot enough, the onions steam and turn pale and soggy instead of caramelizing.

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.

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