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Buttered Eggs

Eggs fried with tomatoes, onion or garlic, seasoned with pepper and salt.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Why it works: Tomato and pepper are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 17,923 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓

Buttered Eggs

Ingredients

Directions

  1. Peel the tomatoes and fry them in boiling oil with chopped onion, shallot, or garlic.

  2. Break in the eggs and add pepper and salt.

  3. Stir with a wooden spoon until just set and serve hot.

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. Tomato + peppertop 7% of all pairs
    Smell alikemoderate
    Cooked together17,923 recipes

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

  2. Tomato + oniontop 8% of all pairs
    Smell alikemoderate
    Cooked together20,633 recipes

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

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

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

  4. Egg + peppertop 33% of all pairs
    Smell alikelow
    Cooked together50,580 recipes

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

  5. Onion + eggtop 34% of all pairs
    Smell alikelow
    Cooked together23,333 recipes

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

Egg and pepper barely smell alike, yet cooks put them together in 50,580 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

Tomatoes
Break down into a juicy, sweet, slightly acidic base for the eggs.
Eggs
Set into soft curds that bind the tomatoes into a creamy, cohesive dish.
Onion, shallot, or garlic
Adds aromatic sweetness and savoury depth as it softens in the hot oil.

The step that matters

Stir the eggs until just set. Eggs turn rubbery and dry when overcooked, since their proteins tighten under sustained high heat. Removing them while still soft keeps the curds tender and moist.

Swap the onion

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

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

Fit is the average pairing score against tomato, egg, 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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