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Duchess Potatoes

A baked potato cake made with mashed potatoes, butter, salt, pepper, egg yolks, and brushed with egg white.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Why it works: Potato and pepper are a kitchen classic. They rank in the top 9% of all ingredient pairs, and cooks put them together in 8,305 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓

Duchess Potatoes

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

  1. Boil the potatoes until tender, then mash them through a colander.

  2. Mix in the butter, salt, pepper, and egg yolks.

  3. Shape the mixture into cakes that are 2 inches long and 1 inch wide.

  4. Place the cakes on a buttered baking sheet.

Bake

  1. Brush the tops with egg white and bake in a 400°F (200°C) oven 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. Potato + peppertop 9% of all pairs
    Smell alikemoderate
    Cooked together8,305 recipes

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

  2. Potato + buttertop 13% of all pairs
    Smell alikemoderate
    Cooked together6,456 recipes

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

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

    Shared aroma: decanal (soap, orange peel).

  4. Butter + peppertop 21% of all pairs
    Smell alikemoderate
    Cooked together85,593 recipes

    Shared aroma: trans-2-nonenal (cardboard, fatty).

  5. Potato + eggtop 29% of all pairs
    Smell alikemoderate
    Cooked together4,978 recipes

    Shared aroma: (e)-2-octenal (fatty, green).

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

What each ingredient does

Potatoes
Form the bulk of the cakes, providing starch that gives a soft, fluffy body when mashed.
Butter
Adds fat and richness, making the mashed potato smooth and tender.
Egg yolks
Enrich the mixture and help bind the cakes so they hold their shape.
Egg white
Brushed on the tops, it promotes even browning and a glossy golden surface.

The step that matters

Brush the tops with egg white and bake until golden brown. Egg white proteins set and brown in the oven, giving a glossy golden crust. Baking long enough browns the surface, while too little time leaves the cakes pale and underdone.

Swap the potato

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

  1. Capsicumfits better
  2. Asparagusfits about as well
  3. Chivefits about as well
  4. Potatothe original

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