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Fried Spanish Onions

Fried Spanish Onions are thinly sliced onions soaked in milk, coated in flour, and fried until golden.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 4 ingredients
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Why it works: Milk and flour are a kitchen classic. They rank in the top 14% of all ingredient pairs, and cooks put them together in 78,219 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓

Fried Spanish Onions

Ingredients

Directions

  1. Slice the onions thinly and soak them in milk for a few minutes.

  2. Coat the soaked onions in flour.

  3. Heat oil in a deep pan and fry the coated onions until golden brown.

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

    Shared aroma: isobutyraldehyde (malty, green).

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

    Shared aroma: isobutyraldehyde (malty, green).

  3. Onion + milktop 20% of all pairs
    Smell alikemoderate
    Cooked together13,418 recipes

    Shared aroma: hexanal (green, grassy).

Milk and flour barely smell alike, yet cooks put them together in 78,219 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
Become sweet and tender when fried, forming the main body of the dish.
Milk
Soaks into the sliced onions, mellowing their sharp bite before frying.
All-purpose flour
Forms a coating that fries into a crisp, golden-brown crust.

The step that matters

Frying the coated onions. The oil must be hot enough to crisp the flour quickly. If it is too cool, the coating absorbs oil and turns greasy; if too hot, the crust browns before the onion softens.

Swap the onion

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

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

Fit is the average pairing score against milk, 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.

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