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Onion Ormoloo

A baked dish of mashed onions and potatoes mixed with milk, eggs, and seasonings.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 8 ingredients
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Why it works: Onion and potato are a kitchen classic. They rank in the top 3% of all ingredient pairs, and cooks put them together in 9,023 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓

Onion Ormoloo

Oven, in the book's wordsA quick oven

Ingredients

Directions

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

Prepare the vegetables

  1. Peel the onions and steep them in cold water for 1 hour.

  2. Boil the onions until soft.

  3. Mash the boiled onions with an equal quantity of boiled potatoes.

Mix and bake

  1. Add the milk and beaten eggs to the mixture.

  2. Stir the mixture vigorously and season with nutmeg, pepper, and salt.

  3. Bake in a 400°F (200°C) oven until done.

  4. Pour melted butter or gravy over the top 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 + potatotop 3% of all pairs
    Smell alikemoderate
    Cooked together9,023 recipes

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

  2. Milk + buttertop 7% of all pairs
    Smell alikemoderate
    Cooked together81,283 recipes

    Shared aroma: (z)-4-heptenal (biscuit, cream).

  3. Nutmeg + peppertop 7% of all pairs
    Smell alikestrong
    Cooked together13,015 recipes

    Shared aroma: 4'-methylacetophenone (bitter almond).

  4. Potato + nutmegtop 8% of all pairs
    Smell alikemoderate
    Cooked together1,052 recipes

    Shared aroma: 4'-methylacetophenone (bitter almond).

  5. Potato + peppertop 9% of all pairs
    Smell alikemoderate
    Cooked together8,305 recipes

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

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

What each ingredient does

Eggs
Bind the mash and help it set into a firm casserole when baked.
Milk
Adds moisture and softness to the mash so it bakes creamy rather than dry.
Potatoes
Add starch that gives the mash body and a smooth, fluffy texture.
White onions
Provide the main flavour and sweetness as they soften when boiled and mashed.

The step that matters

Stir the mixture vigorously. Vigorous stirring after the milk and eggs are added helps distribute the liquid and egg evenly through the mash, so the casserole sets uniformly rather than in patches.

Swap the onion

How well each one fits the dish's main ingredients (potato, milk, egg, nutmeg, pepper, butter):

  1. Capsicumfits better
  2. Chivefits better
  3. Asparagusfits better
  4. Onionthe original

Fit is the average pairing score against potato, milk, egg, nutmeg, pepper, butter. 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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