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A rolled loaf of mashed potatoes mixed with butter, egg, salt, and pepper, baked until golden.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 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 ↓

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 filling

  1. Melt the butter.

  2. Mix the melted butter with the potatoes, egg, salt, and pepper.

Shape and bake

  1. Form the mixture into a roll on a floured surface.

  2. Twist the roll, joining the edges with a little egg.

  3. Brush the roll with beaten egg and mark with a knife or fork.

  4. Place on a floured baking tray and bake at 400°F (200°C) for 20 minutes 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

Sieved cooked potatoes
Form the bulk of the roll, giving it a soft, moist interior.
Butter
Adds richness and moisture, keeping the potato mixture soft and flavourful.
Egg
Binds the potato mixture and, brushed on top, helps the crust turn golden.

The step that matters

Joining the edges of the roll. If the twisted seam is not sealed with egg, the edges can separate in the oven and the filling may leak out during baking.

Swap the potato

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

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

Fit is the average pairing score against butter, 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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