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Eggs, with Onions and Mushrooms

A dish of sliced hard‑boiled eggs mixed with sautéed onions and mushrooms, finished with gravy and flour.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 7 ingredients
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Why it works: Onion and mushroom are a kitchen classic. They rank in the top 10% of all ingredient pairs, and cooks put them together in 10,626 recipes. Both carry 2,4-decadienal, which smells seaweed. The science ↓

Eggs, with Onions and Mushrooms

Ingredients

Directions

Prepare

  1. Remove the yolks from the hard-boiled eggs and cut the whites into strips.

  2. Fry the onions and mushrooms in a pan until softened.

Make the sauce

  1. Add the egg whites to the pan and stir gently.

  2. If there is excess fat, pour it off.

  3. Sprinkle the flour over the mixture and stir to combine.

  4. Add the gravy and bring to a boil.

  5. Gently fold in the egg yolks, then season with salt and pepper.

  6. Let the mixture simmer for about one minute before serving.

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 + mushroomtop 10% of all pairs
    Smell alikemoderate
    Cooked together10,626 recipes

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

  2. Onion + peppertop 11% of all pairs
    Smell alikemoderate
    Cooked together68,474 recipes

    Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).

  3. Mushroom + peppertop 11% of all pairs
    Smell alikemoderate
    Cooked together13,580 recipes

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

  4. Egg + flourtop 15% of all pairs
    Smell alikelow
    Cooked together106,462 recipes

    Shared aroma: isobutyraldehyde (malty, green).

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

    Shared aroma: isobutyraldehyde (malty, green).

Egg and flour barely smell alike, yet cooks put them together in 106,462 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

Hard-boiled eggs
Provide the main body of the dish, with whites and yolks added at different points.
Flour
Thickens the gravy into a smooth sauce as it cooks.
Onion
Softens and sweetens as it fries, adding savory depth.
Mushrooms
Release moisture and savory flavor as they fry alongside the onion.
Gravy
Supplies the liquid and savory base that becomes the sauce.

The step that matters

Gently fold in the egg yolks. Egg yolks are delicate and can break apart or turn grainy if stirred hard or boiled vigorously. Folding them in gently and keeping the mixture at a simmer keeps them intact and the sauce smooth.

Swap the onion

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

  1. Spinachfits better
  2. Shallotfits better
  3. Capsicumfits better
  4. Onionthe original

Fit is the average pairing score against egg, mushroom, flour, 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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