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Pacha Eggs

Baked eggs topped with sautéed onions and grated Parmesan.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 4 ingredients
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Why it works: Butter and parmesan cheese are a kitchen classic. They rank in the top 9% of all ingredient pairs, and cooks put them together in 4,163 recipes. Both carry guaiacol, which smells smoky, sweet. The science ↓

Pacha Eggs

Oven, in the book's wordsA fierce oven

Ingredients

Directions

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

Prepare the onions

  1. Cook the minced onions in butter over low heat until soft but not browned.

  2. Garnish a dish with the cooked onions.

Bake and serve

  1. Break the eggs over the onion garnish.

  2. Sprinkle the eggs with grated Parmesan cheese.

  3. Bake in a 400°F (200°C) oven until the eggs are done and a slight gratin forms.

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. Butter + parmesan cheesetop 9% of all pairs
    Smell alikemoderate
    Cooked together4,163 recipes

    Shared aroma: guaiacol (smoky, sweet).

  2. Onion + buttertop 15% of all pairs
    Smell alikemoderate
    Cooked together42,912 recipes

    Shared aroma: decanal (soap, orange peel).

  3. Onion + parmesan cheesetop 15% of all pairs
    Smell alikemoderate
    Cooked together3,717 recipes

    Shared aroma: guaiacol (smoky, sweet).

  4. Butter + eggtop 17% of all pairs
    Smell alikemoderate
    Cooked together118,967 recipes

    Shared aroma: decanal (soap, orange peel).

  5. Egg + parmesan cheesetop 18% of all pairs
    Smell alikemoderate
    Cooked together3,368 recipes

    Shared aroma: 1-octen-3-ol (mushroom, earthy).

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

What each ingredient does

Eggs
Set to form the main body of the dish as they cook.
Butter
Adds fat and richness and carries flavor when cooking the onions.
Minced onions
Provide savory flavor and a soft base under the eggs.
Grated parmesan cheese
Melts and browns on top, forming a slight gratin with savory flavor.

The step that matters

Bake until the eggs are just set. Eggs turn firm and rubbery when overcooked, since proteins tighten under sustained heat. Pull the dish when the whites are opaque and the yolks still look soft, as they keep cooking from residual heat.

Swap the onion

How well each one fits the dish's main ingredients (butter, egg, parmesan cheese):

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

Fit is the average pairing score against butter, egg, parmesan cheese. 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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