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Potato Border

A baked potato casserole made with mashed potatoes, eggs, butter, and salt.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Why it works: Butter and milk are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 81,283 recipes. Both carry (z)-4-heptenal, which smells biscuit, cream. The science ↓

Potato Border

Ingredients

Directions

The book gives no oven temperature. The 400°F (200°C) in the steps was added when the recipe was transcribed, as a starting point.

Prepare the potatoes

  1. Pare, boil, and mash the potatoes until fine and light.

  2. Add the butter, salt, pepper, and 2 well-beaten eggs to the mashed potatoes.

Shape and bake

  1. Butter a border mold and pack the potato mixture into it.

  2. Let it stand on the kitchen table for 10 minutes.

  3. Turn out onto a dish and brush the top with 1 well-beaten egg.

  4. Brown in a 400°F (200°C) oven.

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 + milktop 7% of all pairs
    Smell alikemoderate
    Cooked together81,283 recipes

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

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

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

  3. Potato + milktop 9% of all pairs
    Smell alikemoderate
    Cooked together3,611 recipes

    Shared aroma: (e,z)-2,6-nonadienal (cucumber, melon).

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

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

  5. Egg + buttertop 17% of all pairs
    Smell alikemoderate
    Cooked together118,967 recipes

    Shared aroma: decanal (soap, orange peel).

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 mash, giving the border its body and soft texture.
Eggs
Bind the mashed potato and set when baked, holding the border's shape.
Butter
Adds richness and fat, softening the mash and helping the top brown.
Milk
Adds moisture, keeping the mash smooth and light.

The step that matters

Brush the top with beaten egg before browning. The egg glaze coats the surface and browns in the oven, giving an even golden colour. Brushing evenly prevents pale patches and dry spots on the border.

Swap the potato

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

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

Fit is the average pairing score against egg, butter, milk, 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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