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Dessert

Potato Starch Sponge Cake

A light sponge cake made with eggs, sugar, lemon, potato starch and 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 Starch Sponge Cake

Oven, in the book's wordsA slow oven

Ingredients

Directions

The book says “a slow oven”. The 300°F (150°C) in the steps is the modern equivalent, not the book's own figure.

Prepare

  1. Preheat the oven to 300°F (150°C).

Make the batter

  1. Beat the egg yolks until thick and lemon colored.

  2. Gradually add the sugar while continuing to beat.

  3. Add the lemon juice and grated lemon rind.

  4. In a separate bowl, beat the egg whites until stiff and dry.

  5. Carefully fold the beaten egg whites into the yolk mixture.

  6. Sift the potato starch mixed with salt and gently fold it in.

Bake

  1. Pour the batter into an angel cake pan or deep narrow pan.

  2. Bake for one 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 + lemontop 18% of all pairs
    Smell alikelow
    Cooked together53,532 recipes

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

  3. Egg + lemontop 19% of all pairs
    Smell alikelow
    Cooked together44,316 recipes

    Shared aroma: (e,e)-2,4-decadienal (fatty, deep fried).

  4. Egg + sugartop 21% of all pairs
    Smell alikemoderate
    Cooked together122,807 recipes

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

  5. Egg + potatotop 29% of all pairs
    Smell alikemoderate
    Cooked together4,978 recipes

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

Sugar and lemon barely smell alike, yet cooks put them together in 53,532 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 and yolks build the light, airy structure that holds the cake up.
Sugar
Sweetens the cake and helps stabilize the beaten egg foams.
Potato starch
Provides a tender, delicate crumb with less gluten-like firmness than wheat flour.

The step that matters

Folding the beaten egg whites into the yolk mixture. Egg whites hold the air that makes the cake rise. Folding gently keeps that air in, while stirring or deflating the foam leads to a dense, flat cake.

Swap the potato

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

  1. Asparagusfits better
  2. Arrowrootfits better
  3. Sweet potatofits better
  4. Potatothe original

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