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Potato Border

A baked dish of mashed potatoes mixed with butter, eggs, and seasonings, formed in a border mold.

From an old cookbook · modernised transcription
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Why it works: Milk and butter 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. The book gives no cooking times either; the times in the steps were added in transcription, so check for doneness rather than trusting the clock.

Prepare the potato mixture

  1. Boil the potatoes until tender, then mash until fine and light.

  2. Mix in the butter, salt, pepper, and beaten eggs until well combined.

Shape the border

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

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

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

Bake

  1. Bake in a 400°F (200°C) oven until browned.

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. Milk + buttertop 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. Butter + eggtop 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 border and give a soft, fluffy structure when mashed.
Eggs
Bind the mashed potato and set during baking so the border holds its shape.
Butter
Adds fat for richness and a softer, smoother texture in the potato.
Milk
Adds moisture to keep the mashed potato soft and easy to pack.

The step that matters

Pack the potato mixture firmly into the buttered mold. Pressing out air pockets helps the border hold its shape when turned out, and butter on the mold keeps it from sticking.

Swap the potato

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

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

Fit is the average pairing score against milk, 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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