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Dessert

Potato Flour Sponge Cake

A light sponge cake made with potato flour, eggs, sugar, lemon, and sea salt.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Why it works: Lemon and potato are a kitchen classic. They rank in the top 12% of all ingredient pairs, and cooks put them together in 2,230 recipes. Both carry 2-nonenal, which smells fatty, green. The science ↓

Potato Flour Sponge Cake

Oven, in the book's wordsA slow oven

Ingredients

Directions

Make the batter

  1. Combine egg yolks, sugar, lemon juice, and lemon rind in a bowl.

  2. Add ¼ of the stiffly beaten egg whites; sift in the potato flour and salt, then fold in lightly.

  3. Add the remaining egg whites and flour, one-third at a time, folding gently.

Bake

  1. Pour the batter into a buttered and floured tube pan.

  2. Bake in a preheated oven at 275°F (135°C) for 1 hour.

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. Lemon + potatotop 12% of all pairs
    Smell alikemoderate
    Cooked together2,230 recipes

    Shared aroma: 2-nonenal (fatty, green).

  2. Sugar + flourtop 15% of all pairs
    Smell alikemoderate
    Cooked together92,116 recipes

    Shared aroma: phenylacetaldehyde (hawthorne, honey).

  3. Potato + flourtop 15% of all pairs
    Smell alikemoderate
    Cooked together5,355 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  4. Egg + flourtop 15% of all pairs
    Smell alikelow
    Cooked together106,462 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  5. Lemon + flourtop 17% of all pairs
    Smell alikemoderate
    Cooked together30,404 recipes

    Shared aroma: isobutyraldehyde (malty, green).

Egg and flour barely smell alike, yet cooks put them together in 106,462 recipes: they work on texture and structure more than aroma.

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

What each ingredient does

Eggs
Whipped whites trap air and build the light, airy structure of the sponge.
Potato flour
Its starch gives a tender, delicate crumb with less gluten than wheat flour.
Sugar
Sweetens the cake and helps stabilize the beaten egg whites.
Lemon juice
Adds acidity that brightens flavor and helps keep the egg white foam stable.
Lemon rind
Adds fragrant lemon aroma without extra liquid.

The step that matters

Folding in the egg whites. Whipped whites hold the cake's air, so folding gently and only until combined keeps the batter from deflating and yields a light, tall sponge.

Swap the potato

How well each one fits the dish's main ingredients (egg, sugar, lemon, flour):

  1. Arrowrootfits better
  2. Shallotfits better
  3. Asparagusfits better
  4. Potatothe original

Fit is the average pairing score against egg, sugar, lemon, flour. 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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